This was a disorientating experience, and would result in a significant reduction in spatial awareness.
You can discuss these events during recurrent training, but until you actually experience it you don't fully appreciate just what impact it can have on your mental processes at the time.
Sleepless nights are not uncommon, and visits to the "Trick Cyclist" would be perfectly understandable.
The Captain was PF, and following the event he said " I have control ". This implies reversion to manual flying? So did the AP "cavalry charge" alert sound due to the strike, but the AP stayed engaged?
Why did he not push the AP disconnect button on the control wheel? The effects of mild shock?
The AP operation of the 2000 is not the same as the Saab340 which I guess was the crews previous type? On the 340, operating the pitch trim switch WILL disconnect the AP. This is not the case on the 2000. You can see how confusion might arise.