Meatloaf had a fear of riding a motorcycle during "Hot Patootie" so he not only had a stunt double, but during close-ups of him on the motorcycle he actually was on a wheelchair with the shield connected to it, creating the illusion of him on the motorcycle. See more...
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Deliberate "mistake": In order to create the effect where Brad, Janet and Dr. Scott's bodies are turned into stone by Frank, casts were made of the actor's bodies, to create statues of them for the scene. The device turns their bodies into stone, but somehow a pedestal appears beneath both Brad and Janet - although this is obviously to make the statutes stand, where would the pedestals actually appear from in the story? Richard O'Brien, the screenwriter and writer of the original musical, referenced to the pedestals during the DVD commentary, expressing his dislike for them, but also questioning where they would have appeared from.