I frankly don’t understand how that would instantly kill someone.
She didn’t knock him down, or hit him at a high rate of speed.
A ton rolled over him, and I can believe injuries and even death if no medical care was given, but instant death? Doesn’t sound likely to me.
Imagine a cantaloupe under a tire. Think head injuries.
I wonder what an autopsy would show as to actual cause of death.
Visualize a tube of toothpaste.