diff --git a/app/assets/javascripts/editor/participantsupport.js.erb b/app/assets/javascripts/editor/participantsupport.js.erb
index 91e9f0d1..63787f4a 100644
--- a/app/assets/javascripts/editor/participantsupport.js.erb
+++ b/app/assets/javascripts/editor/participantsupport.js.erb
@@ -59,8 +59,6 @@ CodeOceanEditorCodePilot = {
   }
 };
 
-//Request for comments does currently not work on staging platform (no relative root_url used here).
-//To fix this rely on ruby routes
 CodeOceanEditorRequestForComments = {
   requestComments: function () {
     var user_id = $('#editor').data('user-id');
@@ -83,6 +81,8 @@ CodeOceanEditorRequestForComments = {
       }).done(function () {
         this.hideSpinner();
         $.flash.success({text: $('#askForCommentsButton').data('message-success')});
+        // trigger a run
+        this.runSubmission.call(this, submission);
       }.bind(this)).error(this.ajaxError.bind(this));
     };
 
diff --git a/app/assets/javascripts/editor/submissions.js.erb b/app/assets/javascripts/editor/submissions.js.erb
index 20d8cd10..21250f7e 100644
--- a/app/assets/javascripts/editor/submissions.js.erb
+++ b/app/assets/javascripts/editor/submissions.js.erb
@@ -142,19 +142,21 @@ CodeOceanEditorSubmissions = {
    * Execution-Logic
    */
   runCode: function(event) {
-      event.preventDefault();
-      if ($('#run').is(':visible')) {
-        this.createSubmission('#run', null, function(response) {
-          //Run part starts here
-          $('#stop').data('url', response.stop_url);
-          this.running = true;
-          this.showSpinner($('#run'));
-          $('#score_div').addClass('hidden');
-          this.toggleButtonStates();
-          var url = response.run_url.replace(this.FILENAME_URL_PLACEHOLDER, this.active_file.filename.replace(/#$/,'')); // remove # if it is the last character, this is not part of the filename and just an anchor
-          this.initializeSocketForRunning(url);
-        }.bind(this));
-      }
+    event.preventDefault();
+    if ($('#run').is(':visible')) {
+      this.createSubmission('#run', null, this.runSubmission.bind(this));
+    }
+  },
+
+  runSubmission: function (submission) {
+    //Run part starts here
+    $('#stop').data('url', submission.stop_url);
+    this.running = true;
+    this.showSpinner($('#run'));
+    $('#score_div').addClass('hidden');
+    this.toggleButtonStates();
+    var url = submission.run_url.replace(this.FILENAME_URL_PLACEHOLDER, this.active_file.filename.replace(/#$/,'')); // remove # if it is the last character, this is not part of the filename and just an anchor
+    this.initializeSocketForRunning(url);
   },
 
   saveCode: function(event) {
diff --git a/app/assets/stylesheets/statistics.css.scss b/app/assets/stylesheets/statistics.css.scss
index f656cd9a..a5ea4430 100644
--- a/app/assets/stylesheets/statistics.css.scss
+++ b/app/assets/stylesheets/statistics.css.scss
@@ -42,6 +42,14 @@ div.positive-result {
   box-shadow: 0px 0px 11px 1px rgba(44,222,0,1);
 }
 
+div.unknown-result {
+  border-radius: 50%;
+  background-color: #ffca00;
+  -webkit-box-shadow: 0px 0px 11px 1px rgb(255, 202, 0);
+  -moz-box-shadow: 0px 0px 11px 1px rgb(255, 202, 0);
+  box-shadow: 0px 0px 11px 1px rgb(255, 202, 0);
+}
+
 div.negative-result {
   border-radius: 50%;
   background-color: #ff2600;
diff --git a/app/controllers/concerns/submission_scoring.rb b/app/controllers/concerns/submission_scoring.rb
index 16f1f061..41f9ff26 100644
--- a/app/controllers/concerns/submission_scoring.rb
+++ b/app/controllers/concerns/submission_scoring.rb
@@ -9,7 +9,7 @@ module SubmissionScoring
         assessment = assessor.assess(output)
         passed = ((assessment[:passed] == assessment[:count]) and (assessment[:score] > 0))
         testrun_output = passed ? nil : output[:stderr]
-        Testrun.new(submission: submission, file: file, passed: passed, output: testrun_output).save
+        Testrun.new(submission: submission, cause: 'assess', file: file, passed: passed, output: testrun_output).save
         output.merge!(assessment)
         output.merge!(filename: file.name_with_extension, message: feedback_message(file, output[:score]), weight: file.weight)
       end
diff --git a/app/controllers/request_for_comments_controller.rb b/app/controllers/request_for_comments_controller.rb
index 8ef8f866..4fd19a92 100644
--- a/app/controllers/request_for_comments_controller.rb
+++ b/app/controllers/request_for_comments_controller.rb
@@ -1,4 +1,5 @@
 class RequestForCommentsController < ApplicationController
+  include SubmissionScoring
   before_action :set_request_for_comment, only: [:show, :edit, :update, :destroy, :mark_as_solved, :set_thank_you_note]
 
   skip_after_action :verify_authorized
@@ -107,6 +108,10 @@ class RequestForCommentsController < ApplicationController
     @request_for_comment = RequestForComment.new(request_for_comment_params)
     respond_to do |format|
       if @request_for_comment.save
+        # create thread here and execute tests. A run is triggered from the frontend and does not need to be handled here.
+        Thread.new do
+          score_submission(@request_for_comment.submission)
+        end
         format.json { render :show, status: :created, location: @request_for_comment }
       else
         format.html { render :new }
diff --git a/app/controllers/submissions_controller.rb b/app/controllers/submissions_controller.rb
index 9b37fde0..52baefe1 100644
--- a/app/controllers/submissions_controller.rb
+++ b/app/controllers/submissions_controller.rb
@@ -262,7 +262,7 @@ class SubmissionsController < ApplicationController
   def save_run_output
     if !@message_buffer.blank?
       @message_buffer = @message_buffer[(0..max_message_buffer_size-1)] # trim the string to max_message_buffer_size chars
-      Testrun.create(file: @file, submission: @submission, output: @message_buffer)
+      Testrun.create(file: @file, cause: 'run', submission: @submission, output: @message_buffer)
     end
   end
 
diff --git a/app/views/exercises/external_users/statistics.html.slim b/app/views/exercises/external_users/statistics.html.slim
index 313a19b0..8b5c3b30 100644
--- a/app/views/exercises/external_users/statistics.html.slim
+++ b/app/views/exercises/external_users/statistics.html.slim
@@ -54,8 +54,10 @@ h1 = "#{@exercise} (external user #{@external_user})"
                   -submission_or_intervention.testruns.each do |run|
                     - if run.passed
                       .unit-test-result.positive-result  title=run.output
-                    - else
+                    - elsif run.failed
                       .unit-test-result.negative-result title=run.output
+                    - else
+                      .unit-test-result.unknown-result title=run.output
                 td = Time.at(deltas[1..index].inject(:+)).utc.strftime("%H:%M:%S") if index > 0
                 -working_times_until.push((Time.at(deltas[1..index].inject(:+)).utc.strftime("%H:%M:%S") if index > 0))
               - elsif submission_or_intervention.is_a? UserExerciseIntervention
diff --git a/db/migrate/20170830083601_add_cause_to_testruns.rb b/db/migrate/20170830083601_add_cause_to_testruns.rb
new file mode 100644
index 00000000..f9a859c4
--- /dev/null
+++ b/db/migrate/20170830083601_add_cause_to_testruns.rb
@@ -0,0 +1,18 @@
+class AddCauseToTestruns < ActiveRecord::Migration
+  def up
+    add_column :testruns, :cause, :string
+    Testrun.reset_column_information
+    Testrun.all.each{ |testrun|
+      if(testrun.submission.nil?)
+        say_with_time "#{testrun.id} has no submission" do end
+      else
+        testrun.cause = testrun.submission.cause
+        testrun.save
+      end
+    }
+  end
+
+  def down
+    remove_column :testruns, :cause
+  end
+end