This is a video that I can't even describe with the usual oh-woah-wow-look-at-this sort of excitement, because it just plain scares me. It shows how a Christmas tree can burn down an entire room in less than a minute.

While I know that this video was filmed under controlled conditions, a room set up by researchers with safety measures to keep the fire from spreading, I still can't watch it without glancing over at my own Christmas tree and shivering. [Wired]