Just got this news report about a skier who triggered two avalanches in Park City. Before you start getting worked up, it should be noted that this skier was no slouch – the article quotes Utah Avalanche Center’s Drew Hardesty as calling the guy “a very experienced professional.”
What’s notable is that the slide occurred on a mellow gradient, only 15-20 degrees – normally too mellow for avalanche danger. So riders be forewarned.
For visual reference, this joystick is mounted at a 20 degree angle:

That’s insane, I heard about that but I didn’t know the guy was a professional. I also didn’t realise that it was only on a 20 degree slope, something to think about during snowboard season..