Going 75 MPH south on the Long Beach Freeway riding on the hood with another guy weaving around in lanes trying to shake me off the car. 1983-true story. I proved to the guy it is nearly impossible to shake someone off the car weaving abruptly if you distribute your weight properly. You have to run the car into another object to have the guy on the hood thrown off. There is no other way to generate enough force.

They try to make it look like a struggle in TV shows, but it is pretty easy.