I've always had hilariously crazy times with my friends. It was my ENFP friend's birthday party, and it was him, me, an INFJ, an INFP, and an INTP. We were at the INFP's house. The INTP dude decided to put meatspin as the INFP dude's homepage, so while he was doing that we all went in the bathroom and got totally naked, and covered our crotches with our boxers. Then we snuck to the door so he wouldn't hear us, and then we busted in and we were yelling and shit. Then we started pushing him around (not roughly) and just messing with him. Keep in mind he's a bit of a homophobe, lol. Then that escalated into a whipped cream and shaving cream fight, and I ended up being chased about 1/4 of a mile down his road with only boxers covering me... with a guy chasing me with shaving cream.

Thank god no one drove by.
The same group of friends I was with there decided it would be a good idea to play Airsoft while drunk.
I was staying with that same INFP friend at his house another time. This guy had broken into his house and stole pretty much all of his video games while we were at school. We knew who he was too, since he stole everyone's stuff. So that night we broke into his house and stole it back. My friend picked the lock, and the backpack he used to steal the stuff was sitting right by the door, so we took that and ran like hell. This was in a hispanic ghetto keep in mind... lots of crime.
I almost drowned going intertubing. I went over some really bad rapids, and I was thrown from my tube. Somehow my bathing suit got stuck under a GIANT rock, I don't even know how. I had my pocket knife on me thankfully, which was clipped to my shorts, and I cut myself out after I got oriented after about ~45 seconds of being under water. It was a painful ride down on those rocks,

I got majorly bruised. But hey, I'm alive.
I also went on a blind date with someone that I didn't know to a gay bar. That was fun.

And it was her idea too!