So today I will be cutting what may be the most dangerous fallen tree that I've ever ventured. Wish me luck.

A red oak 35 feet long and 20 inches thick that is driven into the railroad track, approximately 4 feet underground and pinned on the other end against the steep hillside, which caused it to bow in the middle. It's an immensely unstable 3.5 tons of tree waiting to unleash it's pent-up energy, but there's a lot of oak firewood there.
I think I have the physics figured out, and I cleared an escape route, but who knows with mother nature?