I've also done dead, dead, dead removals that no one in their sane mind would climb and no higher tree for a decent TIP by being elevated in a man basket on a crane.
It's like using a really long reach bucket truck with someone else at the controls and if you impart rotational forces to the basket, well, you will rotate. It's a 4' by 6' platform, you've got a fall arrest harness clipped in overhead, you learn to walk your feet against the forces the chainsaw imparts pretty quick.
Also very spendy, crane is on the job far longer than a climb and pick.
But when it's the only way anyone can think of doing it...
Northwind