I guess if you are not right next to the errant tree (as
I am when using a chain saw), identification and selection of a proper course of action is more difficult.
I can relate to that. I have over 30 years of experience with a chain saw (consumer use) and one time I was cutting down a tree, using the proper procedure, when the tree started spinning--yes, spinning--on its trunk. I had no idea of the direction in which it was going to fall, so I just decided to run one way and luckily for me, it was one of the right ways.