Yup it's a pretty good idea too. Pets, odd structures, children, terrain type, puddles, water run off areas. Not to mention you need to account for the wind. D

Yup it's a pretty good idea too. Pets, odd structures, children, terrain type, puddles, water run off areas. Not to mention you need to account for the wind. Drones can actually fly really well in wind, and while obviously they won't be flying in strong winds, you never know if there'll be a gust. In rural/suburban/residential districts the airspace is pretty darn clear above the treeline/buildings. Assuming you aren't next to a large airport, there is little to no air traffic, there's more wind but there's plenty of room, etc. I couldn't tell from the video, but I'd assume they drop the entire string to prevent it from being snagged.