Someone saved my roommates life one night.
We were all out a club, like 8 of us, and we were all drinking and clubbing and having a good time. It was one kids birthday (my other roommate) Needless to say John made out with a guy but that's a different story (tried saying it was his birthday so he could do whatever he wanted) but my other roommate Nico, he fell down in a dark alley and crawled to the intersection where some random guy after he crawled from 2am to about 4 am paid for his taxi back to our room. If that guy didn't pay he probably would have died.
I have a few other stories about that night, but not relating to saving a life. Maybe just an asshole or two