Quote Originally Posted by jamstigator
I think they're relaxing their face/cheek muscles and then violently shaking their heads from side to side, and having someone take a picture. The results are so funny, my sides hurt from laughing.
Yup, thats exactly what they are doing. Theres a how to here, http://www.jowlers.com/howto/

Thats a really unique idea for a site, I admire it.

rofl, I just took a 'jowler' it worked surprisingly good.