Negligent Discharge

What's the story behind this one?

• Whats up with the Desk Dolly shooting the mirror in the weight room in 6. We have a range for that

Practicing quick draws in front of the mirror? 

Exercising with the gun tucked in your waistband?

Could find a spare three-pound dumbbell, so you're curling with your pistol?

We're at a loss here.