I triggered this with a pretty fast edged turn at about 12:15 on Sunday, April 8, 1012. I rode it standing up until escaping to skier's right below second clump of trees. Initial slough was in loose new snow from end of last week; simultaneously with the step out to the skier's right, probably caused by a very hard edge check, I believe the slough may have stepped down. The flow that I was riding became more chunky and you can just make out a little ledge clear across at that pointg. 2 photos attached. First is from top of Saddleback Lift; Second is from top of Tombstone Lift. Both were taken on Monday morning and are contrast enhanced to show detail. I reported immediately to Patrol to the effect that I was only person in the zone and I was, and still am, OK.