As a driver, with a child of a famous rich person on board, getting out of the vehicle for an altercation is sheer madness. Not saying the guy deserves to get run over, but it's a pretty good outcome considering. I would bet that from a legal perspective blocking a vehicle with a body doesn't give consent to be run over, but that stalking and targeting someone AND detaining that persons vehicle with a body gives full license for bodily harm to escape. Probably not up to and including death without direct threats, a weapon, and threatening action, but certainly assault.
"The man said he was a delivery driver for UberEats, the Washington Post reported, and “made several bizarre and unsupported claims, including that he believed [Grimes] was sending him coded messages through her Instagram posts; that Musk was monitoring his real-time location; and that Musk could control Uber Eats to block him from receiving a delivery order.”
Grimes, whose real name is Claire Boucher, lives in a house near the gas station where the altercation occurred, the Post reported."