I have heard multiple accounts of extended hangfires with World War II .45 ammo, including a hangfire exceeding 5 seconds that killed a would-be murderer (he stole the gun from a World War II vet and used it to rob a gas station. The gun went *click* when he tried to kill the attendant, and he looked down the barrel).
I bet that looking down the barrel increases the probability of having a hang-fire rather than a dud exponentially.
Good gracious, look at the first guy's trigger jerk! No wonder he was aiming at the planet Earth--the broad side of a barn would have been asking too much.