These consumer drones just aren't that great at going where they're supposed to, and when they lose touch with the controller it seems they go haywire. Bruce B wrote that Dorsey's first drone was lost that way, and I noticed other such stories on Amazon.com reviews (example http://www.amazon.com/review/R2Z1D6LSSV4THC/ref=cm_cr_dp_title?ie=UTF8&ASIN=B00P30JB1Q&nodeID=502394&store=photo)
Then there's operator error, too.