Play with egg

The egg is spinning about its long axis and is precessing about the vertical axis. The vertical force N at the bottom end is about the same as the weight of the egg and it exerts a torque NX about the center of mass G. If the egg is not spinning then NX is the only torque and the egg will fall. If the egg is spinning then the torque NX causes the egg to precess and the egg will rise.

Streamlined shape of the egg allow us to flip the egg by blowing at it. Once the egg is in an airstream it will try to flip to lower its center of gravity.