Digital Photography School recently investigated “jowling” (aka “slap n’ flap”). More examples can also be found on Jowels.com.
How do you do it? Get your subject to relax their facial muscles completely (to the point that they have no facial expression)… open their eyes and mouth (try to keep them open)… then to shake their head from side to side as fast as they can. Start snapping (use a flash and fast shutter speed to freeze the ‘action’)!
