In our company we (often) read about cargo pallets that shifted during T/O (rotation) in our monthly safety bulletin (hooks improperly latched).
This can also happen at TOD when a steep descent is initiated.
Maybe, just maybe a cargo shift took place during rotation. This (I think) would be rather difficult to handle from a tail-prevent-strike point of view.
I doubt that any pilot has never made a mistake, however small it may be.
