Due to the programming nature of the Galuf-Exdeath fight, it was inevitable that some glitches would arise, but... damn...
First, if you have him with rapid fire and the blood sword he dies... with full HP. Yeah.
Second... okay, just use Self-Destruct. It's... wow.
Do you think this was intentional or an oversight? Should they have tested this scene more carefully to prevent this kind of thing?