How about, "When have you come the closest to NEVER shooting someone?"

My two partners and I had just finished the judgmental training part of a CO concealed handgun class a month or so ago. When we're "shooting" on the simulator our guns are locked in the safe - safety reasons and all that.

Here we are, the 3 of us, certified, professional firearms instructors teaching people how to be prepared, avoid conflict, always be ready, blah, blah, blah...

We come out of the classroom after the last student left, it's dark, and there's some shifty looking transient-type hanging out in the shadows in front of our class. Guy was "out there", too. He starts quickly walking right towards the 3 of us without saying a word...like he's on a mission.

My partner quietly asks, "You got your gun?".

"Uh, no. It's in the safe. Do you have yours?", I asked.

"No. It's in the safe."

In about a 1/4 second I'd already visualized the headlines in the paper the next day:

3 Concealed Firearm Instructors Robbed in Front of Shooting School - None Armed!

Luckily the kid was just curious what we were doing and wandered away after a few innocent questions.

I felt stupid.