Moment at 0:00 in Impact at 10 km/h without seatbelt by Victor Cozmei.
I've experienced a sudden stop at about 10km without a seatbelt, and the sudden hard knock of my head against the windshield was a very clear wakeup call. Even at that speed i had a nasty headache and a mild concussion
Saved by 78-83 Malibu.