Mavic pro drone failure in crop circle

I visited this crop circle in Hannington, near Swindon, on 9th Aug 2017. The formarion was about 5 days old. My Mavic pro camera drone refused to fly across the ring that encloses the flattened area of wheat. There is another interesting story about this same crop circle. See https://www.youtube.com/watch?v=DwAUotu2zS8

Any tips or questions?

What do you want to tell the drone pilot?