Had an interesting experience last summer, I had my P2 straight above my house, probably 2-300' up in the air if I had to guess, and I could hear a sound coming from the southeast, turns out it was the local hospital's life flight helicopter buzzing right above the trees coming right over my house.

It was all I could do to get my drone down by the time he came right over my house. Wonder what would of happened if they collided? The P2 I had took forever to come down, even though I was trying my hardest..