I assume the Predator does some similar sort of thing?

Yes, though the antecedants may be confused. The IR door lock represents the alien, the predator, who has heat vision. You represent Arnie. The coat represents implausibly high heat capacity river mud. All that's necessary is for you to smash the lock with your bare hands and it'd be perfect; you can't say you're not tempted.

It would, of course, be vastly more amusing (in a glad-I'm-a-long-way-away kind of way) if, for the sake of accuracy, the door also featured a thermonuclear self-destruct system keyed to activate in the unlikely event that anyone succeeded in escaping from the building.