From nsaik
When Nick Saik, a cinematographer from Alberta, Canada, wanted to film his sister Laura hula hooping, he did it the original way: hang a small wide-angle camera to her hula hoop. The result is a one-of-a-kind movie captured from the hoop’s perspective (in fact, a little bit down since the camera is hanging from the hoop) and looking as if it is the girl who is the one twirling around the hoop.
source kottke