There is a large bur oak, Quercus macrocarpa, straddling the lot line between the in-laws and us. It was about the size of the Nelson sycamore, but with way more mass to the branches. In the storm it shed a branch that was about two feet across where it broke off. We knew the branch was hollow because wood ducks nested up there in a cavity. When it snapped off we feared that the whole tree was hollow.
They just finished cutting off the stub. Doctor Chainsaw in the cherry picker just pronounced the tree sound, good for another 250 years. High fives all around! I ain't takin' no more pictures of no more trees no more.