After flying in loiter mode for a while the quad-copter suddenly flipped over. I immediately switched to Stabilize mode and increased throttle in an attempt to save the situation. It stabilized itself just before hitting the ground but sadly had too much horizontal velocity. As a result, the quadcopter snagged and rolled in spectacular fashion. The damage was two motor mounts and a landing gear. The cause of the flip: bad connection to one of thESC’s’s from the APM 2.5 output.