http://nfl.si.com/2012/12/23/randall-cobb-takes-advantage-of-bizarre-nfl-rule/ If you click the link it has the video of it
I like how one of the comments on that page says how Welker used to do this all the time in college "on punts and kickoffs." That's very interesting, since if you do it on a punt the ball is of course spotted where you're standing, and it's a terrible play.
Ya I remember Leon Washington doing this a couple times for us. Westhoff knew and understood the rule quite well.