Go watch this video clip of a guy tossing a pot of boiling water into -40C air and be amazed. What results is a sudden cloud-like formation directly over the guy’s head as the boiling water rapidly freezes in mid-air. It was apparently shot in Saskatchewan where temps like that during the winter are fairly common. The clip is short and worth watching just for the neato factor.
Of course I should warn any of you impressionable kids out there to think twice before tossing pots of boiling water around trying to replicate this clip as many of you are idiots who will stand upwind or will try it on a summer day and end up frying your dumbass face off.
Link found via Boing Boing.