I fell off of my bike and broke my collar bone a few years back. Up until that point, i was young and naive enough to not be fully aware that not everyone shared the same experiences I had, including basic first aid training from the boy scouts. So when a bystander who saw the crash came over to "help", the first thing he said was "we have to get you out of the street", and he started trying to pick me up and drag me. I had to scream at him before he would listen and put me down. I remember being completely flabbergasted that he had done the one thing they tell you to never do -- try to move an injured person. I had to explain to him that if I had a neck injury, he could have just paralyzed me.