Cat Food Sandwich

To begin our selection of dastardly reader submissions, Asylum reader Chuck wrote:

I had a co-worker back in the early '80s that insisted on eating my lunch from the fridge in our lunchroom. I had warned him on many occasions but he would laugh it off or deny it. I had my wife buy a can of tuna cat food and mix it up as she would real tuna, and sure enough he took the 'bait.' He $hit himself at work later that afternoon and went home. Needless to say, problem solved!