After flying in loiter mode for a while the quad copter suddenly flipped over. I immediately switched to Stabilize mode and increased throttle to try and save the situation. It stabilized itself just before hitting the ground but sadly had too much horizontal velocity when lightly snagging the grass. This caused the copter to roll and break 2 motor mounts and a landing gear. The cause of the flip was because of a bad connection to 1 of the esc’s from the APM 2.5 output.