What's the worst thing you've ever done to anyone?

Well the last bad thing i did was play along with a guy who had tryed to sell me a broken phone.
I knew he would give me my money back easily, but i still told everyone that i was gonna punch him.
By the time i came to ask for the refund he dropped the phone he was shaking that much :-[I've done much worse things before then but i like to think i'm past that now.
I used to be a right #@%$*~

I missed the shot on a certain German that caused the holocaust. O.o

There was this girl I liked.I made a Yo Mama joke toward one of her friends.We never talked since.

The honestly worst thing I've done to a person. That comes to memory was cheat on one of my girlfriends, but the reason I cheated was it was an online relationship and she disappeared for six bloody months without a word to me or anyone.When she came back the first thing she said to her friends and me was. "Hey guys, I'm not a virgin anymore :) "We were stunned. Turned out she went to some kind of massive party at a friend's house and just bummed there for a few months.

I got expelled from school for putting glad wrap over the girls toilets after pulling up the seats so they'd pee on themselves.

Fighterfox · #22I missed the shot on a certain German that caused the holocaust. O.o

Who?

Flirting with the girlfriend of some guy that i met this summer she actually liked it that i was flirting with her :P