Totally awesome video! It looks like the guy that triggered it made out alive and on top without loss of machine. That's one daring stunt ride - over a cliff in an avalanche. Guess he's glad he lived to talk about it. It's neat seeing those other machines scurrying away like ants as the avy front approaches. A step down avy too! The other interesting thing is how the video captured the speed of propagation. The fracture started well off to the right and a camera flash later the left side went. Sweet serendipity that you got it!
Glad these people survived. Awesome video of this event. This actually took place in BC not Alberta.
Be safe out there all.