Was planning on skiing down the Emma's today and noticed a pocket in the Emma's and one on Flagstaff skinner. Decided to go up and investigate the slide on Flagstaff. Ran into the party who triggered the slide on our way up. They said they triggered it on their way up remotely. It seemed to be a wind loaded pocket that may have stepped down. We didn't go look at the crown as planned. We went up pole line pass and didn't see any other activity. We did not experience any collapsing or cracking. However there was significant wind blowing in our tracks between runs.