That was "cool" (ha - get it?!). Whenever I see something like that, I think "you know, they had to get a camera down there somehow." I'd love to see the release form a cameraman working for some of these nature shows has to sign. Better pay pretty good, too.
Quite a few years ago it was revealed that some of the "amazing" wildlife shots on the BBC nature programs were created in the studio. Possibly the closeups of the guy harvesting the molluscs were???