I can't really recall doing anything terribly bad when I was a youngster, but the worst thing I could remember was probably when I was living in Arizona, a friend dared me to take one of the baby kittens from one of the neighbor's house. The garage door was slightly open so I slid underneath and found a litter of kittens nearby. I grabbed one and we took the kitten back to my house. Then the next thing I remembered, I thought it would be funny to introduce the kitten to the family dog, so I opened the fence door and left the kitten in the backyard with the dog. Didn't turn out good for the kitten, and eventually my friend and I got in trouble for it.