I've come across this before, and it's pretty cool. Funny thing though is that when avalanche danger is 'considerable' in the alpine (like during this exercise), most of my touring buddies and I wouldn't go near the majority of that terrain. A lot of those zones are near where I live too so I already know the 'correct' route to the top... I guess you could call that cheating?
As for the sound of the jetpack setting off avalanches - I think Mythbusters busted that. Well, they busted the myth that a human voice can set off an avalanche, but perhaps a jetpack is loud enough? Perhaps they need to revisit the scenario!