foot

You can generate power by pivoting on your foot. Here is a clip from master Chen Zhonghua’s 2005 Taiji Tradition Camp in Victoria, BC, Canada.
[youtube=http://www.youtube.com/watch?v=DlFW7GjBri4]

Go here for more on this topic:
http://wujimon.com/2007/what-does-a-camera-tripod-have-to-do-with-taiji/
http://hunyuantaiji.livejournal.com/