IMAX film screenings are special experiences. Not many theaters play the actual IMAX celluloid, and that is in large part because of the insane logistics involved with projecting the film. YouTuber Adam Savage recently poked around IMAX’s Los Angeles headquarters, giving a behind-the-scenes tour. IMAX is 15-perforation, 70mm film — but 5mm of that is dedicated to audio, so the picture size is 65mm. Nevertheless, the physical image is almost 10 times the size of standard 35mm film. It has to run horizontally through the projector. This enormous size means that an IMAX film that runs for one hour weighs about the same as a WWE wrestler, or 300 pounds. Directors who love the format, like Christopher Nolan and Jordan Peele, will pop into the L.A. IMAX HQ to view dailies in the David Keighley Theater projection booth they have there (dailies are the raw clips from a shoot).…