Vocabulary & context for 'tricky' jobs, AKA "hazard trees", and varying levels of risk in tree work

[@joescissorhands141]

Reg's open-question presentation: th-cam.com/video/QJUXVsE3xYA/w-d-xo.html
Awesome video of him in-action:
th-cam.com/video/D4fdxUPuEnY/w-d-xo.html
Schultz's outstanding 2019 tcia presentation (well, an addendum to it)
th-cam.com/video/KTnBnmFkefc/w-d-xo.html