New heights of selfishness

This morning I witnessed a hit and run accident, where a young driver blew through a red light and hit an elderly lady walking across the street. He paused for a second, and then took off. I pulled over to help her and call the police. Only one other car pulled over, out of a full 4 way intersection of people. If I give them the benefit of the doubt, I could assume that some of them figured that a crowd wouldn't be more helpful than two people. I think it's more likely that they thought "hey, I'm late for work. Someone else will help." Shockingly selfish.