My dad was driving a truck full of pigs back in the 70s. He was driving with 2 friends in a very heavy rain. They were crossing a shitty Mexican bridge when they lost traction and went off into the river upside down. The river/channel was narrow so they doors wouldn’t open. They managed to break the windshield and escape. None of the pigs survived. But neither the pigs nor my dad or friends were wearing seatbelts… because Mexico and 1970’s, reasons, etc. I mean the truck was a Datsun and those things did not have seatbelts installed from what I recall.