Don't forget the people who try to pack in to an already FULL elevator, with their bags and all the other stuff causing people to trip over.
Also the rubberneckers on the same side of the accident, who cause injuries to the rescuers ...all because they want to see a bit of gore!
My WORST pet hate (pet peeve) is if I'm standing on a train, bus, etc and I see an OAP, or a person holding a young child struggling to get on board and no one in that immediate area offering assistance.
Then, after getting up to help, having some idiot take the seat I was going to offer.