"And Mary's a head on the floor! Ha ha! Someone fetch a basket."
So he hired a director, gathered a bunch of actors, and recreated the 1587 beheading of Mary Stuart from start to uncensored-head-rolling finish (s**t, even Game of Thrones cut away before that blade hit Sean Bean's neck). The 18-second film actually features the first trick edit, at the moment when the actress playing Mary is replaced with a mannequin. Normally we wouldn't bother pointing out that a movie didn't actually kill one of its actors, but when you're talking about a movie produced by a guy who was absolutely willing to publicly execute animals in order to sell his inventions, anything is possible.