That's nuts. Just emphasises how hard it is to not only predict, but control avalanches.
When I was living in Summit County one winter, I showed up at ABasin and there was a long "stain" on the East Wall (a patroller called it a "diaper stain"). It was a narrow avi that was half rocks and boulders and debris that a bomb from the day before set off. You wouldn't have been just buried, you would have been ground to parts. And yet, we were allowed to ski right up and over that thing the very next day. Why was the wall safe then, 24 hours later?
funny like a clown