I hate practical jokes. One time I was working at a shop. I was under the hood, and this jackass decided it would be funny to honk the horn. Smacked my head on the hood. I had an 1 1/4" wrench in my hand. I wanted to smack him with it. Another time (same shop) it was slow, and the boss had me put up an antenna two stories up on the roof. They had me use a fork lift to get on the top. The guy that was running the fork lift though it'd be funny to back up a few feet when I was 2 stories in the air. Then slammed on the brakes. I almost fell off. One night after work we were all in the shop. He mentioned something about me being afraid of heights. I yelled at him for what he did. The boss was right there and almost punched him in the face. I know people that have fallen from that distance. One broke his hip. I could have easily gotten killed.

It certainly helps in life to learn how to take a joke... and sometimes that's a hard lesson to learn.