A lot of people around me are into this. They fill up these balloons with gas that's used for professional whipcream cans and breathe in and out of the balloon for a while. After that they space out for 10-20 seconds and start laughing. It looks kinda hot when chicks do it because it looks like they're having an orgasm. I tried it a couple of times and while it's pretty fun, I don't really see the big deal about it. It gave me a big headache afterwards. I just don't care about it that much while a lot of people act like it's a party in itself. I dunno, I guess I'm getting over the whole drugs/getting wasted thing. Any of you guys into this shit?