Stretch out that facial muscles and give them a workout, with this fun new app from Nike and Wieden + Kennedy Tokyo. 'Free Face' lets you get all up in your webcam's face so the more you contort your face, the more you can control the Nike Free's sole. The stronger your expression (the weirder you look) the harder the shoe works.
The site is built entirely in Flash and uses both facial recognition and expression recognition technologies. First, it will photograph your 'at-ease' (normal) expression, then use that as a base to calculate how flexible your face is. The movement of the shoe will then depend on various things -- the horizontal line will be defined using your mouth's symmetry, for example.