The tree, it turns out, was ready to go. We walked past it every day and used to comment on how the little hollow at the bottom would be a great house for some little creature. Turns out, the whole thing was pretty rotten on the inside:
Pretty much just the bark holding it up! No wonder it fell.
Here’s another view, this time looking up toward our house. (It looks like that pole is resting on the van, but the van is further down the block.)