Re: irenew... stupid ki tricks?
I haven't seen the ad you're talking about but, I've seen many like it. Raise your heels, you'll be harder to push over. Relax your body, you'll be more stable. I've seen those kind of people doing the same tricks for magic magnets, shoe inserts, energy/relaxation drinks, you name it.
It's the same tomfoolery that you'll see in poor martial arts schools. Simple mechanics being passed off as a magic fix all.