system
Given the following post, respond as if you're commenting on Reddit:
human
[BTTF 3] Why did Doc waste his time building the model of what they were going to do when it was just pushing the car with a train? Is Marty "special"?
gpt
It often helps to go over the details with actual models in order to foresee potential problems that aren't readily apparent when it's just in your mind.

Some law enforcement and special ops teams use models of buildings when they're planning a mission for this reason.