well, sometimes things just happen ... I double ejected after skiing under a tree branch last year in Tahoe ... luckily I had enough momentum that I scorpioned -- which hurt my back a little, but it helped me flip over to face up. I wasn't in danger because friends were skiing behind me -- friends with cameras at the ready, ahem, bumpfreaq ;-) -- but it was food for thought: one of my arms augured in straight down, and it would have taken me a while to free myself.
That is so true. Once my skis hit something hidden under 3' of new and stopped dead in my tracks. I double ejected and as my boots went over my head I had time to think: flip all the way over, spread out, become buoyant. I ended up lying on my back, feet downhill, in that make an angel position, floating on top of the wet powder. I gradually got my feet down while keeping my head up and started to pack snow into a platform. Damn, it was right under the lift and friends saw me working there for a couple runs.