Which way is up?

Interesting little tip I just learned. It seems like common sense but I would have never thought to do it.
If you ever find yourself buried in an avalanche and not sure which way is up, just spit. See which way the spit runs and then dig in the opposite direction. Ya know... because of gravity and all. Most people in that situation, sadly, tend to dig downward because they become so distraught and don't know which direction is which.
I personally found that very interesting and possibly lifesaving.
Another one... if you're in water and have the same direction problem, blow bubbles and swim up with them.  :-)