Reminds me of the time we scared the crap out of my little brother. We were lads at the time and picking this guy up to get us alcohol, and he was scary lookin to begin with. Long scuzzy hair, green army jacket, dirty fingernails, bad attitude, and he had the 1000 yard stare (probably from Vietnam War or something). So my little brother was sitting in the front, and the only open spot in the car was the seat right behind him, and my pals and I decided to play a little joke.
We told my brother "Okay, we are almost to Cutter's house"
my bro: "Cutter? Is that his real name?"
me: "No, we just call him that because he likes to cut people. Don't worry though, it's still day time and he's usually sober during the day"
friend: "yeah, he used to cut himself a lot, but now he is cutting other people. We are worried about him, but we need beer, so...."
Then "Cutter" comes out of his mom's house, stumbles into my car, wreaking of vodka, drunk off his ass. I tell my brother "don't look at him or talk to him when he's drunk. He doesn't like to be looked at" My brother looks like he is going to cry because he is so scared.
So then "Cutter" starts talkin, and asks who the kid is in the front seat, askin jokingly if he's a narc or something. My brother was petrified, even shaking. Cutter says "hey, I'm talkin to you!" and my brother is lookin at me to bail him out, but I did not. Then Cutter grabbed the seat behind his head and my brother screamed so loud and jumped so high, we could not refrain from laughing any longer, so the joke was up. My brother still tells me how scared he was from time to time, once he confided that he honestly thought he was going to die.