He was only buried for 4 and a half minutes which is incredibly short. In that time, though, you can hear his breathing already accelerate. The ruffling noise back and forth is his chest rising and falling and the noise that his jacket makes. The intermittent whimpering noise you hear is him trying to swallow and get some air. Still sends chills up the back of my neck. Oh and they located him so fast because his right glove came off just before he came completley to rest and there was an excellent visual of course.
The digging out is utterly amazing. I don't think that you could've paid a Hollywood crew to stage something better. The fact that he could've been facing any 360 direction and yet he's looking right up into the sun-filled blue sky with that first full scoop away of the shovel is borderline spiritual.