I got all excited thinking of the potential of keeping this at the bottom of someone's pack given it's low weight, until I remembered how much I despise people flying drones on top of my head whenever I'm out in the outdoors, looking for a peaceful place to connect with nature.
Exactly how I feel. For me, I think the best use case for drones, if I were to get one someday, is for shooting sports/events where the prop noise would be drowned out by an already noisy environment.
Like motocross, or a basketball game, or a car meet.
There's no way I'm taking out a buzzy drone when out on a quiet hike or at a typical campground. Just kills the calmness.