In the back of your head, you pressed that button knowing that it was wrong.  Why didn't you concentrate more, was the last thought you had, as you felt a hard sharp pain on your head.  It hits you so hard, you feel the room going darker and darker.  You wake up and there is a bucket chained to your head.   A huge chain starts pulling you towards the wall.   The last thing you ever hear is the sound of a saw blade firing up.   

The End.