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@stevemould388 videos20 yrs
10Kin 28d
7.06Min 28d
$10.8Kin 14d
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9:12Since published
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16:31The "Perpetual Motion" Pump That Actually Works
13:23This Device Goes Past Equilibrium
20:01The Euler Disc Is The Wrong Shape
13:26The Arm Spin That Stops a Fall
16:45The Anti Trampoline Effect
