Long ago in a land far away a driver decided to have some fun with his buddies. Before going into diner for lunch and without his buddies knowing he carefully placed a glop of peanut butter on the side of his shoe near the sole. After a few minutes sitting with the guys in a booth, he began to sniff and say "what the heck is that smell?" He looked around a bit and eventually looked down at the floor. Then he said "oh no" and took off his shoe with the peanut butter. Then with the other guys watching he rubbed off a bit of the peanut butter with his finger and tasted it and said "Yep, just what I thought." Well, the other guys just about upchucked. A "gotcha" for the ages IMHO.