Why the fuck would you get out of the vehicle?
The one rolling down the hill? I wouldn’t, but he is working with different parameters to me. He is (apparently) someone who is capable of pulling off a move like that and styling it out, whereas I am a slightly overweight 38 year old stoner with a bad back who would almost certainly die attempting to leave the vehicle and would of course be safer strapped inside. There’s also the possibility that he had no intention of getting out but just didn’t strap himself in, underestimating the likelihood of the truck rolling.
And here we see the adult Motorhead emerging from his pupae.