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I think you are missing one thing; Such a solution would not be fun!After all, the first unofficial commandment here at instructables is that all solutions are good, except the boring ones.I have to admit, though, that I touched on the same thought myself. I couldn't help associating to dolls that "fall asleep" when you put them down. Their sleepy eyes are most certainly not powered by an electric motor.

Well, how many of your friends and colleagues have you asked? You'd be surprised how many of them hide a pair of pressure chamber windows right next to their 4.3 kg engine valves.