This was so easy to disprove! C'mon people...
In HD it's quite evident he's blowing air, before and after the punch. By pausing the video right before and after one can notice how he inflates the cheeks and blows the air. In the following image I captured, you can see:
- The cheeks inflated.
- Blowing air.
- Punch is already returning, but the third candle is yet to be affected, and the second one not yet extinguished.
http://postimg.org/image/e0ffjqhbj/James Randy once debunked a guy who could make the pages of a book 'move at the power of his mind'. He developed a method to blow air very accurately with a lot of force without his face showing it at all