Now that I know it's a OCTA quad something in the log makes more sense. Right after the copter Yawed about 180 degrees I see the motors start to change. They were fighting a Yaw which maybe caused by a motor starting to fail.
When a motor fails on an OCTA quad the quad starts to spin out of control since it is no longer able to keep it's yaw.
This was discussed in other threads that the copter should still fly after a motor failure but they say it crashes and I don't know if they were going to fix this or if there is a work around.