The commander stated that, should the aircraft pitch up or down uncontrollably during a manual reversion check, he had been trained to roll the aircraft to unload the pressure on the elevator and release the controls before reinstating the hydraulics. The commander therefore, rolled the aircraft left 91.2°
Why o why would you roll 90degrees when in a relatively benign nose down (-2.81deg) situation? A roll should be used only in a nose up situation to limit the nose up and allow the nose to drop by being in a turn. Having said that top kudos for the subsequent recovery - 20 000ft/min = not a lot of time to the deck & a real possibility of inducing structual failure at Vne+100kts