The tree is strongly leaning to the left.
If it weren't for the rope, when it gets cut through at the bottom it would certainly fall to the left (which will cause the ladder to fall and cause the guy to fall.)
But there is a rope holding the tree from the right-side direction. So if the man cuts the tree down to a hinge but doesn't cut through the hinge:
* the rope will hold the tree trunk steady on one side,
* gravity will hold it steady on the other side,
* the 2" - thick strip of uncut wood (the hinge) running perpendicular to the rope will hold the tree steady on the bottom.
Therefore, he can take down his ladder and move his saw, get to a safe place, BEFORE they use a pickup truck or winch to pull the tree forward (to the right in the pic.)
If it weren't for the rope, when it gets cut through at the bottom it would certainly fall to the left (which will cause the ladder to fall and cause the guy to fall.)
But there is a rope holding the tree from the right-side direction. So if the man cuts the tree down to a hinge but doesn't cut through the hinge:
* the rope will hold the tree trunk steady on one side,
* gravity will hold it steady on the other side,
* the 2" - thick strip of uncut wood (the hinge) running perpendicular to the rope will hold the tree steady on the bottom.
Therefore, he can take down his ladder and move his saw, get to a safe place, BEFORE they use a pickup truck or winch to pull the tree forward (to the right in the pic.)