Summary: the ICE agent Jonathan Ross was not in danger of getting run over when he killed Renee Good. He came in contact with the car, but could clearly see that the driver was steering away from him. Regardless, he shot 3 times, once after being passed by.
Not standing and walking in front of a car is basically cop 101. “Routine” vehicle stops are one of the most potentially dangerous things cops do, there’s all of the unknowns of who is actually in the car and how they’re going to react, what can happen if they try to flee, dangers from passing traffic, etc.
So they always approach your car very carefully and absolutely do not walk in front of it if it can be avoided.