It was a specialized, calculated face cut, used in a critical situation, probably beyond the understanding of a certain asinine flatlander.
We call it a block-cut, it is used to retain absolute control of the tree, during the fall, when the trunk contacts the stump and when the trunk leaves the stump. This is about how the tree falls and reacts to the ground, not just where it ends up.
There is no room for error with this one, powerlines close on the right, the chimney within two feet on left. Up the hill was a fire hydrant, electrical junction box, power pole and a shallow water main.