Milly lift to Milly summit, skiing down the Eastish aspect of Milly Ridge back toward main Brighton resort

skiing down just above Mary Chutes, my partner and I thought nothing of dropping a small cliff to flat.  I decided I did not feel comfortable and took a "chute" that changed aspect a little bit and was very tight next to the cliff.  As I slashed a turn, the slope collapsed a little above me and I experienced debris washing all around me, and I was on my butt trying to swim out of it for a little.  As it slowed down I got up and skied off of it.  Some of the debris washed over ≈100 foot cliff and into Milly Bowl at Brighton resort.  The crown was checked out by Brighton ski patrol and reported to be 18" deep, running most likely on surface hoar.  Approximate size is 30-40 feet across, and running 50 feet vertical.