I'm rolling a fully inflated (30 inch) ball on a flat cement floor. I don't think there are any space-time problems either, because no other balls (or any form of matter) display any erratic motion in the same place.
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Originally Posted by Dave Flowerday
If you look closely at the ball you can probably see that some sections of the skin are thicker than the others, which is what causes the problem (I think, anyway).
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I think its something like that - it just seems pretty extreem to me.