Batman looked pretty tall.
Several surprising things about the stop. (1) they let batman get out of the car. Here in California, the cops don't want you to get out of the car. (2 they shook hands with him, I'd think the police wouldn't get that physically close to someone standing in front of them. (3) they alllowed him to place his back to them, bend over, and get the registration out of the glove compartment. While batman was doing this, they couldn't see what he was getting out of the glove compartment. Could have been a gun. He could have spun around and had the drop on both of them.