So I researched and answered my own question and will post for others who might care
I asked earlier about the domino-falling (using one tree to knock down another). I found this on the WA State Legislature
website:
Now my new question is this: What was so dangerous about that 16" DBH tree? Why would you use a much larger tree to knock down such a wimpy tree? I guess the smaller "danger" tree
could have kicked back off of a log on the ground but AFAICT he had endless possibilities for escape routes. He was cutting on the edge of the cut block and could've just ran right into the standing trees.
I know the show is filmed in Oregon but thought laws might be similar.