Hangfires are rare but happen - of course, one of this length is extremely rare - maybe even impossible to reproduce. They occur with older ammunition when the primer is activated but there is a delay before the propellent ignites. (vs a misfire which is a complete failure). Usually a hangfire is measured in fractions of seconds - but can sometime be longer. But long enough time to "check the weapon", run out, etc - would be very very very rare. Further - if he checked his weapon and was sure that it was a misfire (as opposed to a hangfire) - he should have ejected the cartridge. Any well trained, knowledgeable gun owner would know not to ever point a loaded gun at anything unless you were planning on shooting it - and after a misfire or hangfire - you should wait, and don't even eject the bullet until you're sure that it's not going to fire. (Unless you're in the military and in a firefight - in which case you tap rack and continue shooting.) So this verdict is troubling and anybody who buys it, should also acknowledge the stupidity of arming teachers if they buy that this was an "accident". Also - given the budget and pay of teachers in the U.S. - they may be more inclined to buy cheap or surplus ammunition - which increases the odds of misfires, and hangfires.