Yeah, I saw that on the National Geografic Channel
(or was it the HIstory Channel?) last nite. The key is inverting
the shark. In 2005, just before Katrina, I petted an inverted
bull shark in the New Orleans Aquarium. Thay can bark,
when thay r upside down; surprizingly, thay sound like dogs.
(if their mouths r above water)