I know this is a subject that's been beaten to death, but in the last several nights I've seen some movies in which characters handle guns in some unusual ways.
In one movie ("The Brave One"), the character holds the gun with the weak hand index finger on the front of the trigger guard, with the weak hand above and covering the strong hand. That's all well and good, except that the gun is a revolver, and the weak hand is over the cylinder gap.
In another movie, a police officer is moving through a darkened building, holding a flashlight in one hand and Glock in the other. The usual method is for the gun hand to rest on the flashlight hand or wrist, but in this case the cop is holding the flashlight on top of the gun, over the ejection port. (Maybe it's a trick way to catch brass before it goes flying).
In Kevin Kostner's "The Untouchables", Elliott Ness holds his toddler daughter in his arms, with his 1911 pointed at the back of her head and his finger on the trigger.
In the movie "Street Kings", Keaneu Reeves wakes up with his clothes on, hung over. He feels around under the blanket, and finds his 1911. He does a chamber check, sees the chambered round, then moves the slide back forward. He then inserts the full magazine that was lying beside the pistol. Why remove the magazine when there's a round in the chamber?
In another movie, the actor points the barrel of his revolver up, swings open the cylinder, then lowers the barrel and snaps the cylinder closed. No rounds fall out of the cylinder, but in the last shot the cylinder is loaded.
In "The Shooter", Kate Mara picks up Ned Beatty's polished Beretta after he's been disarmed. She then fires four shots into her assailant before the pistol goes to slide lock. Who carries a gun with just four rounds in it?
Just a few examples, and I could go on forever. I wonder if movie producers would use volunteers as weapons advisors?