Never, ever, EVER! Put toothpicks/cocktail-sticks in your back pocket.
...I learned this little gem only a few minutes ago; when I got out of the car and felt the contents of my back sky rocket go tight as I stood up. That sensation only lasted for a split second until something gave, and it was the skin on the back of my leg as a tootpick exerted enough force to pierce it and dig a good half inch into said leg. OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOUCH!
Every day's a school day!