"You have to be half baked to take your seat belt off while you are on a plane, for any reason but to run to the toilet. "
i don't think having it on matters 99.99% of the time, if your going to die, your going to die, seatbelt will probably either cut you in half, or keep ya held down so ya can burn/asphyxiate (assuming you live that long)
at 30k+ catastrophic problems are lethal no matter what, if its baqd enough to need a seatbelt to hold ya down and yer that high up..yer gonna die.