It'd be impossible for me to tell what my actual least favorite moment from any RPG is, since all the bad from all the games I've played has become one big blur over time. Also some games were just all bad, it feels like using one of those would be cheating.

That said, my contribution to this thread is gonna have to be FF8's "Oh we actually all grew up in the same orphanage but conveniently forgot because of GFs. Also after this we're completely dropping the GF-induced amnesia angle again, because we don't want to change your gameplay"