yep. those BTU's are never worth your life. and if you ever even believe there is a possibility of things going wrong let mother nature or an insured professional with the right equipment do the job
That's why they're called widowmakers. Looking back, I was pretty lucky in my early 20's as I dropped a few lodged trees like that. I won't touch them now.
I shudder every time I hear about someone doing that and fail to understand why they would even consider it.