Originally posted by Goldendragon7
Well, guys, the answer is simple.. when you practice by yourself to brace or slap the striking arm or your body brings to "life" the other hand. It gives a more complete feel about the delivery of the whole body behind the action. Some actions are sandwich actions, yet other have as was mentioned rebounding effect, yet the main reason is that since there is no one there to actually strike this helps in the "timing and feel" of the technique.
Obviously striking oneself is useless unless it has a purpose. So this is a good question but easily answered when shown. I hope I have enlightened you to some degree, as to explain it in words is tough to completely see it.
:asian: [/B]