If you are the first driver to arrive at the scene of a serious road traffic accident with injuries, what is your immediate priority sequence?

1. Protect the scene from secondary crashes (turn on hazard lights, place warning triangle), alert emergency services/PSR, and provide first aid without moving casualties unless in fire danger
2. Immediately pull all injured people out of the vehicles and make them stand up
3. Take photos and post them on social media before contacting emergency services
4. Drive past quickly to avoid becoming involved as a witness