Example of a long take, made by a camera operator grabbing a drone mid-flight, and continuing the shot.
The operator has to wear Kevlar to protect themselves from the blades. This one is from Slow Horses, but I've read that they also used in technique in Hacks.
The full take is slightly over 2 minutes - it continues to track the woman get up and go to an ambulance whilst talking on the phone. It's possible that the transition happened in the second minute, but there's a limit on video length for imgur uploads. I guessed that it happened when the shot levels out, (at about the 40 second mark), because I imagine that there are restrictions on how close a drone can get to an actor.
What an awesome shot. I've seen a couple of shots like that before where you just go "ain't no way that's not cg" but then you find out: they found a way.