Characters not shutting their doors when exiting vehicles.
It makes sense in an emergency when they're fleeing for their life or something but it also happens when people are just doing regular things.
Watching a show set in Russian winter (very cold) and the guy literally tells his driver to "keep the car warm" then gets out of the back seat and leaves his door wide open. He's only going a few feet from the car and you can actually see it in the background open the whole time.