Very Chilling videos. Another one that is going around from the head mounted cam of Dave Shaw is also chilling. He died trying to retrieve Deon Dreyers body from Boesmansgat Cave in South Africa. Here is a transcript of an ABC show called Australian Story that went to air shortly after he died.
http://www.abc.net.au/austory/content/2005/s1370703.htm
No video in this link.

Matt