I don’t know what happened up there. But it looks like the trimmer has some broken fingers…? Maybe he cut himself and fainted at the sight or loss of blood…?
The saw is still in the cut.
I assumed the swaying tree had knocked him out but it does look like he cut some of his fingers off one handing the saw.
Poor guy probably went straight into shock 75 ft.up.
Cutting the tree down wasn’t the best option then.