Chainsaws

In video of "Tree Felling How To" the instructor should add a short comment about what you might do if:

1. the felled tree gets hung up in branches of another tree, and does not completely fall to the ground.
2. the tree leans in a direction other than the direction that you want it to fall.
3. Obstacles near the tree to be felled, for example: rock wall, other trees, slope to steep.