Most cynical internet denizens will tell you that the resurgence of 3D is a mere gimmick, meant to drag more people to theaters and jack up ticket prices. (I am one of those cynical people.) Average movie-goers seem to be agreeing, with a resounding “I paid five bucks extra for this crap? I could have had nachos!” 3D has come and gone throughout film history, and each time we come to the same general conclusion: We kinda don’t like it. Until we have some kind of full immersion films (and would they even be films at that point?) we’ll probably never be satisfied. When 3D movies fell apart the first time, Hollywood just went back to doing what they had been doing before the 3D boom: Trying to make good movies. One man was not satisfied, though. William Castle, director and producer of ridiculous B-movies, had a vision. He wanted to make every single one of his films into a spectacle event (much to the annoyance of theaters that booked his movies) that drew the masses to the cinema for the experience. Here are six of his most notorious gimmicks.