Hahaha, that last one.

The only one I have ever really thought about is that the warrior of light suffers from PTSD.
This is the only way I can explain why one moment I am sitting on my chocobo riding through the highlands and then BAM, I'm reliving the Ifrit easy battle, only to find on completion I am still on my now very confused chocobo in the middle of the road wondering why we stopped? Kewh? You don't fight gods without having some sort of adverse reaction - PTSD I tell ya.