This is a horrific story of an undergraduate student doing a science demonstration, which is inexplicably labeled as "humor." I didn't find it at all funny, I'm afraid. It starts reasonably enough, and then escalates slowly into something truly dreadful.

That may have been the point of no return. I, as is traditionally my role, answered that the nitrogen evaporates at the surface of the table, which provides a cushion of air for the drop to sit on, and thermally insulates the drop to minimize further evaporation. So you see a drop dance around without boiling away, and without interacting with the table and getting slowed down or smeared out. Then, I continued... I mentioned that the same principle makes it possible to dip a wet hand into molten lead, or to drink liquid nitrogen without injury.
I had done the latter several years earlier in a cryogenics lab, and remembered the physics behind how it worked. Naturally, people around me were skeptical. "You can't drink the stuff... it'll freeze your whole body... Remember 'Terminator 2?' " But I was sure of myself. I had done it before, and I believed in the physics behind it. So, naturally, I poured myself a glass and took a shot.

At this point, I could feel my entire gastro-intestinal tract going into sympathetic spasm. Ick. For a change, I will spare you the grisly details—read it yourself if you must—but basically the short story is the guy swallowed liquid nitrogen with catastrophic consequences. Here's the "happy" ending.

So... the recovery... they were impressed with my recuperative skills. I could breathe on my own completely after a few days. I could sit up in bed after a week, and was walking in two. About that time, I began to eat again as well. After four weeks, I was up and about again. Now, something like eight weeks, I'm virtually healed, with the exception of a number of unsightly scars.

I think you can surmise from the fact that the guy is relieved to be able to breathe and walk and is covered with scars that the rest of the story isn't exactly pretty.

(via Bastard Sword)