The Chicago Forestry Department removed a tree near my house back in October but left the stump. No one could figure out why—until they tried to remove it a few days ago:
I'm not an arbologist, but it seems to me that the tree had bionic parts. Actually, it looks like it grew through a steel grating in the parkway and then absorbed the grating. In any event, I hope no one got hurt when they tried sawing through the stump.