Camera Olympics

This is a pretty interesting set of photos covering photojournalism at the Olympics. In the linked image, I was thinking that the doo-dad on the back of the camera was some sort of closed circuit tv that would allow the photographer to remotely take photos. However, the associated boxes on the side and hot-shoe are a radio trigger for lights. I guess the doo-dad is a prism to allow a photographer to frame a shot even when the camera is ,a href="http://www.pbase.com/image/33031090">very close to the ground.