diff --git a/app.js b/app.js
index 7f15966228..2710ca1656 100644
--- a/app.js
+++ b/app.js
@@ -2,11 +2,20 @@ if (process.env.NODE_ENV !== 'development') {
   require('newrelic');
 }
 require('dotenv').load();
-/**
- * Module dependencies.
- */
+// handle uncaught exceptions. Forever will restart process on shutdown
+process.on('uncaughtException', function (err) {
+  console.error(
+    (new Date()).toUTCString() + ' uncaughtException:',
+    err.message
+  );
+  console.error(err.stack);
+  /* eslint-disable no-process-exit */
+  process.exit(1);
+  /* eslint-enable no-process-exit */
+});
 
 var express = require('express'),
+    accepts = require('accepts'),
     cookieParser = require('cookie-parser'),
     compress = require('compression'),
     session = require('express-session'),
@@ -430,7 +439,6 @@ app.get('/account/unlink/:provider', userController.getOauthUnlink);
 app.get('/sitemap.xml', resourcesController.sitemap);
 
 
-
 /**
  * OAuth sign-in routes.
  */
@@ -492,17 +500,54 @@ app.get(
     }
 );
 
-//put this route last
+app.get('/induce-vomiting', function(req, res, next) {
+  next(new Error('vomiting induced'));
+});
+
+// put this route last
 app.get(
     '/:username',
     userController.returnUser
 );
 
-
 /**
  * 500 Error Handler.
  */
-app.use(errorHandler());
+if (process.env.NODE_ENV === 'development') {
+  app.use(errorHandler({ log: true }));
+} else {
+  // error handling in production
+  app.use(function(err, req, res, next) {
+
+    // respect err.status
+    if (err.status) {
+      res.statusCode = err.status;
+    }
+
+    // default status code to 500
+    if (res.statusCode < 400) {
+      res.statusCode = 500;
+    }
+
+    // parse res type
+    var accept = accepts(req);
+    var type = accept.type('html', 'json', 'text');
+
+    var message = 'opps! Something went wrong. Please try again later';
+    if (type === 'html') {
+      req.flash('errors', { msg: message });
+      return res.redirect('/');
+    // json
+    } else if (type === 'json') {
+      res.setHeader('Content-Type', 'application/json');
+      return res.send({ message: message });
+    // plain text
+    } else {
+      res.setHeader('Content-Type', 'text/plain');
+      return res.send(message);
+    }
+  });
+}
 
 /**
  * Start Express server.
diff --git a/config/passport.js b/config/passport.js
index af46f12713..970753ce21 100644
--- a/config/passport.js
+++ b/config/passport.js
@@ -27,6 +27,7 @@ passport.deserializeUser(function(id, done) {
 
 passport.use(new LocalStrategy({ usernameField: 'email' }, function(email, password, done) {
   User.findOne({ email: email }, function(err, user) {
+    if (err) { return done(err); }
     if (!user) return done(null, false, { message: 'Email ' + email + ' not found'});
     user.comparePassword(password, function(err, isMatch) {
       if (isMatch) {
@@ -60,17 +61,19 @@ passport.use(new FacebookStrategy(secrets.facebook, function(req, accessToken, r
     User.findOne({ facebook: profile.id }, function(err, existingUser) {
       if (existingUser) {
         req.flash('errors', { msg: 'There is already a Facebook account that belongs to you. Sign in with that account or delete it, then link it with your current account.' });
-        done(err);
+        done();
       } else {
         User.findById(req.user.id, function(err, user) {
+          if (err) { return done(err); }
           user.facebook = profile.id;
           user.tokens.push({ kind: 'facebook', accessToken: accessToken });
           user.profile.name = user.profile.name || profile.displayName;
           user.profile.gender = user.profile.gender || profile._json.gender;
           user.profile.picture = user.profile.picture || 'https://s3.amazonaws.com/freecodecamp/camper-image-placeholder.png';
           user.save(function(err) {
+            if (err) { return done(err); }
             req.flash('info', { msg: 'Facebook account has been linked.' });
-            done(err, user);
+            done(null, user);
           });
         });
       }
@@ -81,7 +84,7 @@ passport.use(new FacebookStrategy(secrets.facebook, function(req, accessToken, r
       User.findOne({ email: profile._json.email }, function(err, existingEmailUser) {
         if (existingEmailUser) {
           req.flash('errors', { msg: 'There is already an account using this email address. Sign in to that account and link it with Facebook manually from Account Settings.' });
-          done(err);
+          done();
         } else {
           var user = new User();
           user.email = profile._json.email;
@@ -128,9 +131,10 @@ passport.use(new FacebookStrategy(secrets.facebook, function(req, accessToken, r
 passport.use(new GitHubStrategy(secrets.github, function(req, accessToken, refreshToken, profile, done) {
   if (req.user) {
     User.findOne({ github: profile.id }, function(err, existingUser) {
+      if (err) { return done(err); }
       if (existingUser) {
         req.flash('errors', { msg: 'There is already a GitHub account that belongs to you. Sign in with that account or delete it, then link it with your current account.' });
-        done(err);
+        done();
       } else {
         User.findById(req.user.id, function(err, user) {
           user.github = profile.id;
@@ -140,19 +144,22 @@ passport.use(new GitHubStrategy(secrets.github, function(req, accessToken, refre
           user.profile.location = user.profile.location || profile._json.location;
           user.profile.website = user.profile.website || profile._json.blog;
           user.save(function(err) {
+            if (err) { return done(err); }
             req.flash('info', { msg: 'GitHub account has been linked.' });
-            done(err, user);
+            done(null, user);
           });
         });
       }
     });
   } else {
     User.findOne({ github: profile.id }, function(err, existingUser) {
+      if (err) { return done(err); }
       if (existingUser) return done(null, existingUser);
       User.findOne({ email: profile._json.email }, function(err, existingEmailUser) {
+        if (err) { return done(err); }
         if (existingEmailUser) {
           req.flash('errors', { msg: 'There is already an account using this email address. Sign in to that account and link it with GitHub manually from Account Settings.' });
-          done(err);
+          done(null);
         } else {
           var user = new User();
           user.email = profile._json.email;
@@ -163,30 +170,31 @@ passport.use(new GitHubStrategy(secrets.github, function(req, accessToken, refre
           user.profile.location = profile._json.location;
           user.profile.website = profile._json.blog;
           user.save(function(err) {
-            done(err, user);
-          });
-          var transporter = nodemailer.createTransport({
-            service: 'Mandrill',
-            auth: {
-              user: secrets.mandrill.user,
-              pass: secrets.mandrill.password
-            }
-          });
-          var mailOptions = {
-            to: user.email,
-            from: 'Team@freecodecamp.com',
-            subject: 'Welcome to Free Code Camp!',
-            text: [
-              'Greetings from San Francisco!\n\n',
-              'Thank you for joining our community.\n',
-              'Feel free to email us at this address if you have any questions about Free Code Camp.\n',
-              "And if you have a moment, check out our blog: blog.freecodecamp.com.\n",
-              'Good luck with the challenges!\n\n',
-              '- the Volunteer Camp Counselor Team'
-            ].join('')
-          };
-          transporter.sendMail(mailOptions, function(err) {
-            if (err) { return err; }
+            if (err) { return done(err); }
+            var transporter = nodemailer.createTransport({
+              service: 'Mandrill',
+              auth: {
+                user: secrets.mandrill.user,
+                pass: secrets.mandrill.password
+              }
+            });
+            var mailOptions = {
+              to: user.email,
+              from: 'Team@freecodecamp.com',
+              subject: 'Welcome to Free Code Camp!',
+              text: [
+                'Greetings from San Francisco!\n\n',
+                'Thank you for joining our community.\n',
+                'Feel free to email us at this address if you have any questions about Free Code Camp.\n',
+                "And if you have a moment, check out our blog: blog.freecodecamp.com.\n",
+                'Good luck with the challenges!\n\n',
+                '- the Volunteer Camp Counselor Team'
+              ].join('')
+            };
+            transporter.sendMail(mailOptions, function(err) {
+              if (err) { return done(err); }
+              done(null, user);
+            });
           });
         }
       });
@@ -199,9 +207,10 @@ passport.use(new GitHubStrategy(secrets.github, function(req, accessToken, refre
 passport.use(new TwitterStrategy(secrets.twitter, function(req, accessToken, tokenSecret, profile, done) {
   if (req.user) {
     User.findOne({ twitter: profile.id }, function(err, existingUser) {
+      if (err) { return done(err); }
       if (existingUser) {
         req.flash('errors', { msg: 'There is already a Twitter account that belongs to you. Sign in with that account or delete it, then link it with your current account.' });
-        done(err);
+        done();
       } else {
         User.findById(req.user.id, function(err, user) {
           user.twitter = profile.id;
@@ -212,8 +221,9 @@ passport.use(new TwitterStrategy(secrets.twitter, function(req, accessToken, tok
           user.profile.picture = user.profile.picture || profile._json.profile_image_url_https.replace('_normal', '');
           user.profile.twitterHandle = user.profile.twitterHandle || profile.username.toLowerCase();
           user.save(function(err) {
+            if (err) { return done(err); }
             req.flash('info', { msg: 'Twitter account has been linked.' });
-            done(err, user);
+            done(null, user);
           });
         });
       }
@@ -221,6 +231,7 @@ passport.use(new TwitterStrategy(secrets.twitter, function(req, accessToken, tok
 
   } else {
     User.findOne({ twitter: profile.id }, function(err, existingUser) {
+      if (err) { return done(err); }
       if (existingUser) return done(null, existingUser);
       var user = new User();
       user.profile.username = profile.username.toLowerCase();
@@ -231,7 +242,8 @@ passport.use(new TwitterStrategy(secrets.twitter, function(req, accessToken, tok
       user.profile.picture = profile._json.profile_image_url_https.replace('_normal', '');
       user.profile.twitterHandle = user.profile.twitterHandle || profile.username.toLowerCase();
       user.save(function(err) {
-        done(err, user);
+        if (err) { return done(err); }
+        done(null, user);
       });
     });
   }
@@ -242,30 +254,35 @@ passport.use(new TwitterStrategy(secrets.twitter, function(req, accessToken, tok
 passport.use(new GoogleStrategy(secrets.google, function(req, accessToken, refreshToken, profile, done) {
   if (req.user) {
     User.findOne({ google: profile.id }, function(err, existingUser) {
+      if (err) { return done(err); }
       if (existingUser) {
         req.flash('errors', { msg: 'There is already a Google account that belongs to you. Sign in with that account or delete it, then link it with your current account.' });
-        done(err);
+        done();
       } else {
         User.findById(req.user.id, function(err, user) {
+          if (err) { return done(err); }
           user.google = profile.id;
           user.tokens.push({ kind: 'google', accessToken: accessToken });
           user.profile.name = user.profile.name || profile.displayName;
           user.profile.gender = user.profile.gender || profile._json.gender;
           user.profile.picture = user.profile.picture || profile._json.picture;
           user.save(function(err) {
+            if (err) { return done(err); }
             req.flash('info', { msg: 'Google account has been linked.' });
-            done(err, user);
+            done(null, user);
           });
         });
       }
     });
   } else {
     User.findOne({ google: profile.id }, function(err, existingUser) {
+      if (err) { return done(err); }
       if (existingUser) return done(null, existingUser);
       User.findOne({ email: profile._json.email }, function(err, existingEmailUser) {
+        if (err) { return done(err); }
         if (existingEmailUser) {
           req.flash('errors', { msg: 'There is already an account using this email address. Sign in to that account and link it with Google manually from Account Settings.' });
-          done(err);
+          done();
         } else {
           var user = new User();
           user.email = profile._json.email;
@@ -275,30 +292,31 @@ passport.use(new GoogleStrategy(secrets.google, function(req, accessToken, refre
           user.profile.gender = profile._json.gender;
           user.profile.picture = profile._json.picture;
           user.save(function(err) {
-            done(err, user);
-          });
-          var transporter = nodemailer.createTransport({
-            service: 'Mandrill',
-            auth: {
-              user: secrets.mandrill.user,
-              pass: secrets.mandrill.password
-            }
-          });
-          var mailOptions = {
-            to: user.email,
-            from: 'Team@freecodecamp.com',
-            subject: 'Welcome to Free Code Camp!',
-            text: [
-              'Greetings from San Francisco!\n\n',
-              'Thank you for joining our community.\n',
-              'Feel free to email us at this address if you have any questions about Free Code Camp.\n',
-              "And if you have a moment, check out our blog: blog.freecodecamp.com.\n",
-              'Good luck with the challenges!\n\n',
-              '- the Volunteer Camp Counselor Team'
-            ].join('')
-          };
-          transporter.sendMail(mailOptions, function(err) {
-            if (err) { return err; }
+            if (err) { return done(err); }
+            var transporter = nodemailer.createTransport({
+              service: 'Mandrill',
+              auth: {
+                user: secrets.mandrill.user,
+                pass: secrets.mandrill.password
+              }
+            });
+            var mailOptions = {
+              to: user.email,
+              from: 'Team@freecodecamp.com',
+              subject: 'Welcome to Free Code Camp!',
+              text: [
+                'Greetings from San Francisco!\n\n',
+                'Thank you for joining our community.\n',
+                'Feel free to email us at this address if you have any questions about Free Code Camp.\n',
+                "And if you have a moment, check out our blog: blog.freecodecamp.com.\n",
+                'Good luck with the challenges!\n\n',
+                '- the Volunteer Camp Counselor Team'
+              ].join('')
+            };
+            transporter.sendMail(mailOptions, function(err) {
+              if (err) { return err; }
+              done(null, user);
+            });
           });
         }
       });
@@ -311,11 +329,13 @@ passport.use(new GoogleStrategy(secrets.google, function(req, accessToken, refre
 passport.use(new LinkedInStrategy(secrets.linkedin, function(req, accessToken, refreshToken, profile, done) {
   if (req.user) {
     User.findOne({ linkedin: profile.id }, function(err, existingUser) {
+      if (err) { return done(err); }
       if (existingUser) {
         req.flash('errors', { msg: 'There is already a LinkedIn account that belongs to you. Sign in with that account or delete it, then link it with your current account.' });
-        done(err);
+        done();
       } else {
         User.findById(req.user.id, function(err, user) {
+          if (err) { return done(err); }
           user.linkedin = profile.id;
           user.tokens.push({ kind: 'linkedin', accessToken: accessToken });
           user.profile.name = user.profile.name || profile.displayName;
@@ -323,8 +343,9 @@ passport.use(new LinkedInStrategy(secrets.linkedin, function(req, accessToken, r
           user.profile.picture = user.profile.picture || profile._json.pictureUrl;
           user.profile.website = user.profile.website || profile._json.publicProfileUrl;
           user.save(function(err) {
+            if (err) { return done(err); }
             req.flash('info', { msg: 'LinkedIn account has been linked.' });
-            done(err, user);
+            done(null, user);
           });
         });
       }
@@ -333,9 +354,10 @@ passport.use(new LinkedInStrategy(secrets.linkedin, function(req, accessToken, r
     User.findOne({ linkedin: profile.id }, function(err, existingUser) {
       if (existingUser) return done(null, existingUser);
       User.findOne({ email: profile._json.emailAddress }, function(err, existingEmailUser) {
+        if (err) { return done(err); }
         if (existingEmailUser) {
           req.flash('errors', { msg: 'There is already an account using this email address. Sign in to that account and link it with LinkedIn manually from Account Settings.' });
-          done(err);
+          done();
         } else {
           var user = new User();
           user.linkedin = profile.id;
@@ -346,30 +368,31 @@ passport.use(new LinkedInStrategy(secrets.linkedin, function(req, accessToken, r
           user.profile.picture = profile._json.pictureUrl;
           user.profile.website = profile._json.publicProfileUrl;
           user.save(function(err) {
-            done(err, user);
-          });
-          var transporter = nodemailer.createTransport({
-            service: 'Mandrill',
-            auth: {
-              user: secrets.mandrill.user,
-              pass: secrets.mandrill.password
-            }
-          });
-          var mailOptions = {
-            to: user.email,
-            from: 'Team@freecodecamp.com',
-            subject: 'Welcome to Free Code Camp!',
-            text: [
-              'Greetings from San Francisco!\n\n',
-              'Thank you for joining our community.\n',
-              'Feel free to email us at this address if you have any questions about Free Code Camp.\n',
-              "And if you have a moment, check out our blog: blog.freecodecamp.com.\n",
-              'Good luck with the challenges!\n\n',
-              '- the Volunteer Camp Counselor Team'
-            ].join('')
-          };
-          transporter.sendMail(mailOptions, function(err) {
-            if (err) { return err; }
+            if (err) { return done(err); }
+            var transporter = nodemailer.createTransport({
+              service: 'Mandrill',
+              auth: {
+                user: secrets.mandrill.user,
+                pass: secrets.mandrill.password
+              }
+            });
+            var mailOptions = {
+              to: user.email,
+              from: 'Team@freecodecamp.com',
+              subject: 'Welcome to Free Code Camp!',
+              text: [
+                'Greetings from San Francisco!\n\n',
+                'Thank you for joining our community.\n',
+                'Feel free to email us at this address if you have any questions about Free Code Camp.\n',
+                "And if you have a moment, check out our blog: blog.freecodecamp.com.\n",
+                'Good luck with the challenges!\n\n',
+                '- the Volunteer Camp Counselor Team'
+              ].join('')
+            };
+            transporter.sendMail(mailOptions, function(err) {
+              if (err) { return err; }
+              done(null, user);
+            });
           });
         }
       });
@@ -380,7 +403,7 @@ passport.use(new LinkedInStrategy(secrets.linkedin, function(req, accessToken, r
 // Login Required middleware.
 
 exports.isAuthenticated = function(req, res, next) {
-  if (req.isAuthenticated()) return next();
+  if (req.isAuthenticated()) { return next(); }
   res.redirect('/login');
 };
 
@@ -394,4 +417,4 @@ exports.isAuthorized = function(req, res, next) {
   } else {
     res.redirect('/auth/' + provider);
   }
-};
\ No newline at end of file
+};
diff --git a/package.json b/package.json
index 732eb86787..ffe8c6281b 100644
--- a/package.json
+++ b/package.json
@@ -15,9 +15,11 @@
     "postinstall": "node seed_data/seed.js"
   },
   "dependencies": {
+    "accepts": "^1.2.5",
     "async": "^0.9.0",
     "bcrypt-nodejs": "^0.0.3",
     "body-parser": "^1.9.3",
+    "chai-jquery": "^2.0.0",
     "cheerio": "^0.18.0",
     "clockwork": "^0.1.1",
     "compression": "^1.2.1",
diff --git a/public/js/lib/bonfire/plugin_v0.1.4.js b/public/js/lib/bonfire/plugin_v0.1.4.js
index 9aa5978c06..f71c0d34f1 100644
--- a/public/js/lib/bonfire/plugin_v0.1.4.js
+++ b/public/js/lib/bonfire/plugin_v0.1.4.js
@@ -17,6 +17,7 @@ var run = function(code) {
     }
 
     application.remote.output(result);
+    self.close();
 };
 
 
diff --git a/seed_data/bonfires.json b/seed_data/bonfires.json
index c298c97db7..a686f7e7f7 100644
--- a/seed_data/bonfires.json
+++ b/seed_data/bonfires.json
@@ -176,7 +176,7 @@
     "tests": [
       "assert.deepEqual(chunk(['a', 'b', 'c', 'd'], 2), [['a', 'b'], ['c', 'd']], 'should return chunked arrays');",
       "assert.deepEqual(chunk([0, 1, 2, 3, 4, 5], 3), [[0, 1, 2], [3, 4, 5]], 'should return chunked arrays');",
-      "assert.deepEqual(chunk([0, 1, 2, 3, 4, 5], 4), [[0, 1, 2, 3], [4, 5]], 'should return cthe last chunk as remaining elements');"
+      "assert.deepEqual(chunk([0, 1, 2, 3, 4, 5], 4), [[0, 1, 2, 3], [4, 5]], 'should return the last chunk as remaining elements');"
     ]
   },
   {