Does that indicate the other trees in that location might also be unstable and likely to block the path?

Not good, if so.

Ooh... MRI scans... I had to have one when I was being assessed for my implant.  A rather boring and noisy few minutes in that machine...  Now I have the implant I cannot have an MRI because I have metal in my head now, but I can still have a CT if necessary because those use X-Ray rather than magnetic.