by phydeux » Thu Jul 08, 2010 6:55 pm
Just speculating here, but maybe he wasn't securely tied into the rope with a bombproof knot (ALWAYS have someone else recheck ho you're tied in!). The knot could have come loose and the rope slid off his harness/carabiner, causing him to fall behind the others. Not out of the question in a rising storm where the snow and wind is whipping around, your goggles (or glasses) are fogging up, and you're trying to concentrate on your footing rather than the rope. And if he suddenly realized what happened and couldn't find the others, it would be prudent to get out of the storm in some type of bivy rather than try and get up/down solo with crevases all around.
3 of the 5 voices in my head are telling me to "Go for it!"