FWIW
The news report that I just read on the internet quoted him as saying that "the knife was too dull to cut well". Hmmm, an experienced person, traipsing about with a dull knife? <img src="images/graemlins/confused.gif" alt="" />

Playing "devil's advocate" here, perhaps he had dulled it in failed attempts to free his arm by working at the boulder. <img src="images/graemlins/crazy.gif" alt="" />

Also noted that the article said that he would not be giving followup interviews.

Regards,
Comanche7