I remember living in Wilmington, NC during the Brandon Lee filming of "The Crow". They needed a sequence when a real S&W .44 Magnum actually had rds. in the cylinder, but "supposedly" had the primers and powder removed.
When fired, for the sound guys to edit later, a live primer, with no powder, managed to lodge a squib .44 Magnum bullet halfway down the barrel.
Went back to the prop room, with no one checking and clearing the pistol. The next day, full power .44 Magnum blanks were loaded in the pistol.
When fired, the squib rd. hit Brandon Lee at 8 feet in the gut with a real .44 Magnum bullet. He died shortly thereafter.
An official review, will take time, but it I am interested in seeing what unfolds.