When I took a Psych course, there was a famous study of a woman being raped in New York. She screamed for help and tons of people heard and ignored it. How can you do that?

The other day at the laundromat, a guy in his 20s was giving the employee a hard time. She's in her 60s and there was no way I was standing by. I told him to fuck off and pick on someone his own age, size and gender.