He stood in front of the car.

When cops say "Stop the car and get out.", you stop the car and get out. You do not step on the gas. He stood in front of the car to prevent her from driving away, assuming she was a sane person who would not try to murder him.

Even if you're sure it's a wrongful arrest, once cops say "stop the car and get out", you stop the car and get out and let your lawyers argue about it later.