Take care of the Tree, or you Might Pay for it with your Home
Wired put up this video almost a year ago, but it shouldn't be forgotten. As seen in the video a Christmas tree can light up with a second, as if Johnny Storm lit a fire under its butt. If you've got yourself a tree then be sure to take the usual precautions since they can be highly flammable.
Leave out a fire extinguisher near those milk and cookies if you're paranoid.
[Wired]