A step back would not guarantee safety. Had there been no ice, the car likely would have struck the agent (b/c she "gunned" the engine).
But yes, it was not safe to step in front of that car. The engine was running and the transmission was engaged at least some of the time. But that is one of the dangers officers face every day, e.g. directing traffic, etc.
foldr says >...which anyone can verify is not the case by watching the video you've linked...<
I invite all to view the video at
https://www.nytimes.com/video/us/100000010631041/minneapolis...
and note that the
- wheels of the car are spinning and/or
- the car is moving forward
whilst the wheels are pointed (assuming the driver's perspective)
- first, to the left of the ICE agent,
- then, toward the ICE agent, and finally,
- to the right of the ICE agent.
That is, she "swept" the position of the ICE agent while the wheels were spinning or pulling the vehicle forward.
foldr says >"...it would be completely insane to try to stop a moving car by shooting the driver..."
Shooting also encourages a driver to point the vehicle away from the shooter.
The question is not one of sanity but of what is legal.
The spinning wheels point to interpretations favorable to the ICE agent. There is no denying that she gunned the motor and simultaneously "swept" his position while the wheels were spinning and the motor racing.