Well that didn't last long, now I know why this quad wasn't very popular. It was flying perfectly fine in open field, with GPS lock, fresh IMU cal, compass cal, etc. Went into sport mode... it just went full tilt past 45 degree and crashed into ground. It's smashed up pretty good, and 1 motor is toast. I couldn't get it to stop going full tilt forward, it's almost like the controller disconnected. Tried going back into GPS mode but it still wouldn't stop. I flew exact same spot yesterday in sport mode and it was fine. I'm not new to this either, have flown DJI Phantoms and Inspires since 2014, never had anything like this happen. This is the first time I've ever crashed a non-toy grade quad.