If you leave your car in the driveway with the keys in the ignition are you "freaked-out" with fear tha it might start-up and run over someone?? _____NO, not gonna happen.
If there's a round in the chamber AND the trigger/trigger guard are covered properly by the holster (and there's nothing else in the pocket) _____ NO, not gonna fire.
It doesn't go off by itself.
Something has to pull the trigger.