Was flying a small electric airplane had control of plane the wind was at about three to five miles per hour my grandson was also there when this happen i was bringing plane back to land an charge the battery while under a controlled landing something out of nowhere came from the high clouds it was the shape of a spider like arm it was a dark color at first i could not believe what i was seeing it just disappeared out of nowhere we walk and walked but could never locate the plane we even had neighbors look with us we never found our plane it was also in a plowed field when this happen