ok guys. here's a fun little experiment to do on a high altitue load...
at about sayyyyy, 18,000 feet, pull the hose away from your face, breath normally and kindly ask your neighbor to ask you a few simple math problems. multiplication, addition, division, subtraction... answer them all.. eventually you'll find yourself taking longer and longer to answer the questions and the answers will soon stop being correct.. its just fun to learn what hypoxia can actually do to your thought processes- that is, of course, while your still conscious. warning! should you conduct this experiment do it with a friend, and tell him to let you know if you turn blue. thanks for listening. practice at your own risk.
oh and to sign off on a mildly hypocritical note,
be safe
~marcus