No I didn't get punched in the face, this is called jowling. Seriously, google it. You basically swing your face back and forth like a dog and snap a photo to catch your cheek fat and lips flapping in the wind. Not very flattering, but looks pretty funny. And, as I discovered, gives you a pretty amazing headache after doing it repeatedly for 10 minutes.
Strobist Info: 580 EX 2 at about 1/8 power at camera left with umbrella.