How to make a 642 or 442 trigger cycle in holster-less pocket carry:
Forget a house or car key in that pocket, then insert gun. That'll do it. This is why I use pocket holsters - and try not to ever put anything else in that pocket.
Make any DA trigger cycle: snag a windbreaker drawstring on the trigger while holstering; or loose shirttail material.
We had another TFL guy post about a discharge due to worn holster leather snagging his trigger when he holstered.
Some folks might want to get off the high horse long enough to consider that someday it might be them, remote though the possibility may seem, that screws up.
At that point, their take on what should constitute a crime may have a sudden shift...