Amazing new song-mixing technology: Nike sneakers?

Nike's new Free Run+ shoes do not make music when you flex them. Nor do they feature ports on the back for plugging them into speakers. But just for this video, they definitely do.

Somewhere in a top secret location in Tokyo, break beat music duo, HIFANA (composed of KEIZOmachine and JUICY) discovered that Nike Free Run+ running shoes can drop beats like realtime samplers and no other. HIFANA eschewed a part of their regular break beat set up and hooked up the mixers and sound systems to Nike Free Run+ shoes. When bent or twisted, the ultra-flexible Nike Free Run+ drops different tunes and sounds.
I'm not quite sure how this advertises the qualities of these running shoes, because it just makes me wish the rest of us got to try to make music with sneakers. Alas, maybe next summer.

Freshness Mag, via Josh Spear