Mesmerizing Drone Video Reveals Massive Size of Hong Kong Protests

This thread will be the catalyst for making me go do some research on drones. I always thought they were just little airplanes flown by remote control. The one taking this video seems to be more sophisticated.

It's amazing how everyone in the crowd was waving and smiling at this machine as it swooped down on them. What if it was a government weapon dispersing poison mist or something? Come to think of it, there was this one segment of the video where everyone was laying in the street passed out. Could the drone have gassed them?

That drone wouldn't be able to fly low over a large USA protest. Someone would take it out. BTY..did the Occupy America movement ever have that many protesters out on the street at one time? Oh..strike that question. We don't have a Billion citizens like China has.
-cwm