I was at a party like that when I was 15. Some of the guys from my class had quite a few shots then climbed out of an attic window onto the roof and (literally) hung around laughing and joking. It was 3 stories high and raining so slippery.
Soon the mother realised and came storming up, got them inside and the party was over.
Puking is one of the better options for what can happen to intoxicated 15 year olds IMO!