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It's safer than a flying drone. People actually do not like low flying drones, especially when they are flying over their backyard and it's a buzzing, flying machine. If it's doing a delivery for you maybe it's okay, but of it's doing a delivery for somebody else, you know, people don't like that. People don't like other machines flying over their backyard where their children are playing. So there's huge social acceptance problems with the robots, with the robots that are flying. But not so much for the robots that are land-based, and safe, and look cute.