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[[Image:Rolling-pitching.png|thumb|200px|Rolling and pitching motions|left]]
The spin-reversal motion follows from the growth of [[flight dynamics|instabilities]] on the other rotation axes, that are rolling (on the main axis) and pitching (on the crosswise axis).<ref>{{Cite web | url=http://online.kitp.ucsb.edu/online/dynamo08/moffatt/ | title=Keith Moffatt, Cambridge Univ. & KITP, Rattleback Reversals: A Prototype of Chiral Dynamics}}</ref>
[[File:Spoon_Celt.webm|thumb|Rattleback made with spoon exhibiting multiple spin reversals. Original video and idea by Prof. Christian Ucke.]]
When there is an asymmetry in the mass distribution with respect to the plane formed by the pitching and the vertical axes, a coupling of these two instabilities arises; one can imagine how the asymmetry in mass will deviate the rattleback when pitching, which will create some rolling.
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