Was working on the computer and heard a big crash outside - evidently you can hear it when a tree falls on your shed. First time using my chainsaw on a roof...but its all cut up and ready to be split. Got it stacked up next to about 2 cords of white pine I have to split. I'm guessing it committed suicide because it was sad that I cut up his friends. Actually the whole base of the tree was rotted right through, but the rest of the tree was solid. Glad it was a small one - it only put a dent in the roof and knocked the door out of square.