INVERTING TOP

_x000D_ Spin this top and it turns up-side-down unexpectect. Edly? This top looks like an ordinary ball with spinning top with spherical shaped central stem. It's centre of mass lies in a sphetical section. Spin the top sharply rolling the stem throught fingers and dropping the top on flat surface. Just look on.. It spins on its flat surface for a few seconds and then inexpectedly turns upside down and continues to spin on the stem. This surprising inversion appears to violate the " Low of conversion of energy" because the top seems to raise its centre of mass without external help. _x000D_