I was on a first date with this chick I met on Plenty Of Fish. We were laughing and having a good time together. After a few drinks she started making fun of me, saying I was nursing my beer (i.e. a slow drinker).

Thinking it would impress her I downed the remaining three quarters of my pint. She was quite impressed, until about 30 seconds later when I suddenly barfed it up into her lap.