I'd like to see some simulations of slab avalanches...The stuff with wet sticky snow looked okay but I think they missed the ability of even low density snow to act cohesively as slabs [1] (which leads to some of the most deadly avalanches). Need to review their math but maybe they only account for particle adhesion and not more crystalline structure (which would obviously make the simulation more expensive).

The woman walking (post holing is the technical term) looked off for the same reason...the snow didn't look slaby/crusty enough to act like it was.

[1]http://2.bp.blogspot.com/-4pGis30qlj0/TwcAGuSz8fI/AAAAAAAAAW...