A practitioner of Chi Gong (or Qigong) performed an amazing (and slightly off-color) feat of strength the other day in Fremont, California. Read about it here (rated R). The article seems not to have any quotation marks, but you can figure it out without much trouble.
At one point the article describes the body part in question as "look[ing] ready to burst." This is consistent with videos I have seen of other Chi Gong demonstrations, in which the practitioners appear to have swelled up significantly. You can also see a hint of this in the movie "Kung Fu Hustle"; compare the normal appearance of the tailor, Iron Fist, to his appearance while he is fighting. His skin appears to puff out, particularly his face and chest.
This was just too cool to pass up. Hat tip to Ace of Spades.