down4fun:Thanks to all of you who replied, and explained things better than I ever could have. You made some good points. As far as why he wants to do this i can only guess. It would seem he is trying to hurt himself and me in the process. I know that he did read this thread and after more discussion gave me his word that he wouldn't do this dive. So I owe all of you a big thank you!
After reading your post and giving this some more thought I went back to some older issues of AquaCorps magazine and some notes I had from a clinical sociologist who did a fair amount of work in the early 90s on tech divers etc.
Is it possible that your friend is suffering from bi-polar manic depression?
It seems to me that if he is he may have feelings of despair that give him reasons to "check out" but the mania provides him the feelings of invincibility that allow him to think the "rules don't apply" to him.
check it out and see if this may apply to him
regards,