My brother's a train driver and a while back he's slowing down into a suburban station and sees a crazy-looking guy teetering on the edge of the platform, so he applies full emergency brakes, and sure enough, the guy jumps. Train stops about 3 inches short of the guy, who leaps up and starts abusing my brother for not killing him!!
The other thing that p**ses him off is kids who jump in front of the train and at the last moment roll out of the way. SOP is apply full brakes, pull down the blind, and don't look: there's no way of telling if the train has hit someone. But next thing he sees kids laughing and running off!