I'm going through parts of our redwood forest with one of these just now to judiciously and safely take out particularly obvious widow-makers. I always wear a helmet, and I'm always steering clear and looking up as I'm working out there.
It's sobering to find a large redwood branch sticking up out of the the ground, broken off, and realize the force it took to drive it so far into the ground. Shudder!
I hope nobody lives within 5 miles of where you're launching those lead widowmakers skyward. They have to come back down somewhere and no brain bucket is going to stop them when they do.
Ian