Re 2: The whole point of a crumple zone is that the car crumples instead of the occupants. More specifically, you want a stiff frame around the occupants creati

Re 2: The whole point of a crumple zone is that the car crumples instead of the occupants. More specifically, you want a stiff frame around the occupants creating a safe volume of space, and anything outside that to be more malleable, so that it absorbs as much energy as possible during impact. Re 3: heavy weight vehicles are indeed much more dangerous than lighter ones to everyone outside of them. That by itself is indeed not a new thing the Cybertruck is bringing to the table (unfortunately). But as for why heavy mass + high acceleration is a especially dangerous combination, refer to Newton's laws of motion.