This script was made by Nex', and then edited and upgraded by me (Juba.RD)
What this script does is decrease your health in car crashes depending on how strong the impact was, and it also works on npcs.

I modified it to add explosions on high speed impacts (or falls), I also added passenger support (all three of them) and vehicle weight detection.
Meaning you can exclude certain vehicles from injuring you in crashes.