I call this the “dervish,” because one spins like Sufi whirling dervishes. Stand with arms outstretched. Find a landmark in the room on which to focus. As you spin past the landmark you can count off the reps. To honor the dervishes, spin counter-clockwise, with one palm turned up toward heaven and the other turned down toward the earth.
Spin around twenty-one times.
Tip: You are likely to feel quite dizzy. Holding a finger in front of your eyes focuses your attention and, ideally, keeps you from falling down.