http://www.digitaljournal.com/article/55219

Practical Joke Victim Stabs Wrong Guy

Posted Nov 18, 2006 by ■ Inkling

http://www.playfuls.com/news_10_3437-Practical-Joke-Leads-To-Stabbing.html

Motor oil in a peanut butter sandwich. Yuck!
Still no excuse for stabbing someone I guess, certainly not the wrong guy.