Even though I agree that this has a certain bullshido aura, I am not quite ready to drop the theory all together. I don't think "forced oscillations" (if what you mean is when a frequency happens to harmoninze with an object causing it to oscillate wildly) is what is going on. I have always thought that what he meant he was doing was just compressing air in a very effective way using his voice. It's more of a blast which makes stuff move and that I guess is not very comfortable But then again, I am not saying that this guy is real, just that I don't think your explanation of why he is wrong is good. :P