First - Freediver??? Are you saying there is no physical exertion to hold onto the sled as it slides down?
Second - Admittedly, the only thing I know about freediving is Tanya Streeter looks good doing it.
Third - Has anyone tried holding their breath all through the film?
Fourth - Freediver, you free dive 60 meters? Incredible! Most scuba divers never see 60meters except on TV.