General rule: Don’t do anything in a small closet at church.
Here's a reason why you shouldn't be showing off your gun at church while in a small closet.
This happened in Florida. A man was in a small church closet with another man showing his gun. Attempting safety, the magazine was removed from the 9mm weapon but there was a round still in the chamber. You can imagine what happened next! The gun ‘accidentally’ went off, firing a bullet through a wall. The bullet didn’t stop but continued until it hit the pastor’s 20 year old daughter. She was also the fiance of the guy in the closet with the other guy that was showing off his gun.
You can read the rest of the story here: Guns in Church