Ball Rolls Down an Incline Verrrry Slowly....

YouTube link.

The video demonstrates an unusual phenomenon that is NOT an optical illusion.  The physical principles involved are self-evident once you see how the "magic ball" is constructed.  Best of all, you can make one of these at home with simple hobby-store materials and impress neighborhood children and intoxicated adults.

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I agree, Dorkafork. I'm astounded that they didn't record the clear ball rolling to show us what's actually going on inside -- it seems like the obvious payoff (even if one can still imagine the logic of it).
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They actually made it with a clear plastic ball, and they didn't bother to film it with the clear ball so people could see what's going on iside? Seriously? Sheesh.
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