I wasn't going to vote for the same reason svidlano cited, but it seems from your opening post that you are only looking for the answer in this particular situation. In otherwords, it seems like instead of "I would NEVER leave my buddy - no exceptions", you meant, "I would NEVER let my buddy ascend alone - no exceptions".
I will say that I would NEVER leave my buddies side - with one exception.
If there was a situation in which I was powerless to help my buddy and would die as a result of staying, I feel that the prudent thing to do (and my buddy's only chance of survival) is to surface for help. This is the ONLY situation/exception in which I would want my buddy to leave me as well. The only thing that I can think of that would put me in that situation is if my buddy was trapped inside something or pinned by something that I could not move. I would somehow mark the location, if possible.
Christian
I will say that I would NEVER leave my buddies side - with one exception.
If there was a situation in which I was powerless to help my buddy and would die as a result of staying, I feel that the prudent thing to do (and my buddy's only chance of survival) is to surface for help. This is the ONLY situation/exception in which I would want my buddy to leave me as well. The only thing that I can think of that would put me in that situation is if my buddy was trapped inside something or pinned by something that I could not move. I would somehow mark the location, if possible.
Christian