"If it was the prop holder, you'd surely expect to see the log record the fall; so I think you lost power first, breaking the prop off last. Unlikely the controller 'went mad', expect it lost contact with something or shorted - how's the battery?"

"This is - throttle down, yaw right, yes? You may need to trim down the throttle; you need to be in 'stabilize' mode. You need to hold the control position for 4+ seconds.
My Futuba RC has throttle on the right stick, so just 'left stick down/right'…"