When handling liquid nitrogen, the key thing is to ensure that no liquid gets spilled into the cuff of your glove from above, or you will lose some flesh or a finger. You can safely pour liquid nitrogen right over your bare hands, provided you don't cup your hands and keep your fingers open - it forms a vapour layer and the liquid runs right off (yes, I have done this repeatedly). But get it caught in a glove, and it has nowhere to go, and pools in the fingers. End of said fingertips...

Way back in the late 70s, we thought that future computing would be done using Johsephson junction superconductors cooled with liquid helium...at 4.2 degrees Kelvin. There was even the requisite cover story in Scientific American that swore it - and I did a Science Congress project on it in 1981. But no one really wants to run a computer at 4.2K (I/O is a bitch), and the liquid gases (especially helium!) are expensive over time. I might just have to buy one of these in honor of those ancient prophecies...