Dying on the street! Surely everyone would try and help? I can understand people being wary if you were being kicked around on the street and people didn't want to get hurt themselves, but if you just encountered someone on their own, injured and distressed, I think you'd have to have a serious look at yourself as a person if you just walked past without trying to help.
I'd charge in like in ER, improvising medical equipment out of biros and sticky tape, save you, plant a kiss on the prettiest girl in the growing crowd, and then walk off with my jacket over my shoulder announcing "I'm not an extraordinary man, I'm just a man doing extraordinary things".