Most people think they would be great in an emergency, but in fact they tend to just freeze as they do not know what to do. The police, firebrigade and ambulance are trained and practice to know what to do and not freeze. Well done you for being more like the emergency services and not freezing. In reality you do not want lots of people trying to help, they just get in each others way. It is also probably more sensible not to approach a burning car. As for people spectating, that is handy for the police as it is lots of potential witnesses are right there at the scene. An investigation into a crash can go way back in time, for example a car driver could see the aftermath of the accident, recognise a vehicle as one behaving erratically 20 minutes earlier and tell the police. People who film can also provide valuable evidence. Even if they post it on youtube, the police can easily get it to use as evidence. Youtube will take down videos and copy content to the police. The bad news is those events will stay with you forever, the good news is that time is a great healer and do take counselling. One session to discuss events can often be enough. Think of it as a critical incident debrief which the emergency services use so people can discuss events.