I Flew an Expensive Drone Into a Fence at Top Speed and You Won't Believe What Happened Next

I swear it was an accident. For two weeks, I flew the DJI Phantom 4 as often as possible, to learn about its quirky but impressive feature set. When it came time for the final test—seeing how obstacle avoidance worked at high speeds—it slipped my mind that the technology doesn’t work at all at high speeds.