True story : I saw a group of unusual objects in the sky a long time ago as a kid when on a family trip along the main highway that runs East and West a few miles North of the Grand Canyon. I tried to get my father to stop and get a better look but he was one of those types who was compelled to get on to the next campground planned on the trip and wouldn't stop.
The objects looked like dozens of miniature classic parachutes. I estimate maybe a yard across and they were falling, but not landing, and seeming be just above tree top level. Always puzzled me, maybe it was a forestry experiment as the area is thick with tall pines. Guess I'll never know what they were. Thanks Dad.
I've tried to recreate closely the Northern Arizona setting I saw back then. The Drone is only an invention, I'm afraid, nothing like the many simple falling mushroom shapes I saw.
vegs - xfrog, Ulco, Mandrake, pineneedles- unknown