Amazing! How long have you been practicing? Spontaneous qigong is powerful! I do it everyday. If you feel your body moving on its own, just let it move and smile from your heart, don't be afraid of the movements, don't control it unless it gets TOO intense. This is a powerful way to cleanse blockages from your body. After the spontaneous movements, put your palms on your lower dantien and meditate for a minute or two to bring your energy back there. You may want to do a research on Wong Kiew Kit's Flowing Breeze Swaying Willows.