It was probably you being drunk and standing up really fast. I remember like a month after I had started smoking, I was smoking out a buddy of mine, and it was his first time smoking. Even after we smoked, we started taking shots of random alcohols. I stood up too fast and smoked a cig for some reason (I had quit for a long time) and I got this massive head rush and just started feeling really, really crappy. So I was like tripping sorta and my vision was all strange and then I puked in the grass. It wasn't too fun. I don't really like alcohol too much. The only other time when I've thrown up on drugs was the first time I did mescaline.