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    I was lying backward on the bed, paws propped up on the pillows, and staring up at the ceiling fan. My brain was pretty dead at the time, or at least buzzing like static, so the first thing I thought of was How hard would it have to spin to fall off the ceiling? It was such a stupid question, but I followed down that train of thought for a while. Did factories do tests of how fast a fan would have to spin before it collapsed? Or is that the architect? Could the blades cut something? Maybe not a finger, but a hotdog or something? Maybe that's some kind of calculation, then. 'How fast can we make this fan without it being able to cut someon