Ok I saw the video for a song, I think called Blindin. And it had a funky beat to it, and in the video, a guy in an orange baseball cap I beleive taps his cheaks to the beat. If you do it yourself, it's kind of that hollow sound. Bleh anyone know wtf I'm blabbering about?
Edit: I think the guy doing the noise is the guy from N.E.R.D.
www.n-e-r-d.com the one in the brown jacket.