Topping trees with an MD 500 helicopter and horizontal aerial saw - GIF

Topping trees with an MD 500 helicopter and horizontal aerial saw.

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Previously:

1922 Pescara helicopter - GIF
Chinook helicopter lands on water - video
Heavy lift helicopter transporting excavator - GIF
Helicopter crashes after clipping hangar - GIF
Helicopter lands on trailer - GIF
Helicopter shreds tarpaulin - GIF
Sikorsky CH-37 Mojave heavy-lift helicopter - photos
Sikorsky-Boeing SB-1 Defiant helicopter - GIF

My question is, Why?

Check this out. https://en.wikipedia.org/wiki/Aerial_saw

Interesting to watch, obviously a very skilled pilot. But what happens when drop line fouls in a tree, or the saw stalls part way through a cut and the operator is left with no option but to jettison an expensive piece of kit?

How is this saw able to cut through a tree in 1 second of contact? Presumably it is spinning incredibly fast. How does it avoid gyroscopic precession?

Possibly has two blades going in opposite directions to cancel the gyroscopic motion?

Maybe they sell the cutoffs as Christmas trees.