Winnerhofer you surmised that “Bonin was napping when the A/P cut-off and in the ensuing alarms, panicked and accidentally used the S/S to pull himself out of his reclined position.
This caused the violent NU.”
This is not consistent with Bonin’s first stick actions, discussed at length on previous threads. IIRC, first he countered uncommanded roll by vigorous side movements and accompanying (I believe unintended) minor pitch variations in both directions but on average slightly nose up (the famous “stirring mayonnaise”).
Only after getting the roll under control did he initiate major nose-up movements, and even then not entirely consistently.
It has been done to death before.