Skinned up Flag to take a peak a upper Days. Wind was terrible, worse than expected. Did not drop Days, looked unsafe and slabbed out. Turned around and went down Flag. At about 9600 turned east over the ridge to get a little air, my normal route, cut hard right to get back on the south face. All of the sudden there were cracks everywhere and was being pulled down. Able to continue right with my momentum and get out of the slide. Saw it run a few hundred feet. Not sure actual depth but was about a foot or so when cracking around me. Sorry no pics.