At the base of the fixed lines we rested and took off some clothes on our way down. i accidentally knocked my helmet off the ledge and it went scooting down about 800' down towards 14,200' camp (it fell at 15,400' or so). it passed dozens of people but was too far away for anyone to do anytihng. it took close to a minute i think. a guy w/ sharp eyes next to us said it went right next to this crevasse and then dissappeared (after passing 3 open crevasses somehow). so on our way down we followed the obvious groove in the snow and it stopped here, at this crevasse. 6/2/05 ~2:30pm.