How Cold Is It?

It's so cold, icicles grow up!

Bad jokes aside, this actually happened. I woke up, went to relieve myself, and low and behold, in the window I saw a small column of ice growing... upwards. I have no idea how this happened. There was no ice above it from leaking water and it probably wouldn't have happened like that either. If it had, it would have just looked like an upside down icicle, like a stalagmite.

Eh, somebody out there probably knows how this happened, but I sure don't.