Well, here's one other possible strategy:
(1) Make sure wind is blowing it at least 30 mph steady with 50 mph gusts.
(2) Make sure tree is leaning away from the prevailing direction of the wind.
(3) Make sure you can stand still and can hold the saw steady while wind is blowing. Lean hard against wind to accomplish this mission.
(4) Make sure you have plenty of health insurance and have no fear of pain.
(5) Light a cigarette in advance of the cuts to give you plenty of confidence in what you are doing. The smoke will be blown free of your eyes.
(6) Keep the cell phone handy in case you need to call 911.
Proceed as normal.