I assumed he meant pocket carry.
Firing a gun (especially a revolver) from the pocket is a bad idea for a lot of reasons.
With an auto you get one shot and the gun will likely jam.
With a revolver, you'll likely get burned through your clothing by the blast coming out of the cylinder/barrel gap (and/or catch your clothing on fire). Good chance of burning your hand too which means you're also probably only getting one shot off.
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