Pushed a small pile of snow into West Monitor Bowl, this quickly initiated a wet slab that was 30ft wide and ran astonishingly fast on the old snow surface. As it proceeded down the slope it gain momentum and volume and ran out onto the flats at the bottom leaving a large, heavy and dense debris pile at the bottom. The bowl already had a few other wet slides from cornice falls and anything over about 34 degrees was primed to wet slide. Seeing this I kept my slope angles down the rest of the day.