Hawk takes down a quadcopter

http://www.theverge.com/2014/10/11/6960397/watch-a-hawk-defend-its-turf-in-the-only-way-it-knows

"Operator Christopher Schmidt says the incident took place at Magazine Beach Park in Cambridge, Massachusetts and that, upon realizing what was about to happen, he quickly throttled down the Phantom FC40 quadcopter's props to keep them from injuring the bird (or worse).
Other copters have not been so lucky

Other bird-meets-drone encounters have not had such happy endings. Last year, another Phantom operator had his drone dive-bombed by a group of birds, that forced it into a crash landing."

I have never had such an issue.  It was good to throttle down the quad so the bird didn't get hurt.