many glitchy places in the barrucha's lair
many places you can run backwards on a bridge and come out on a bridge below it.
several times i have seen the barrucha get stuck.
several places rhue will stop and wait for the barrucha to decapitate him.
and after one of the bridges breaks, it won't allow you to jump across.
sorry i don't have any pictures, i'll try to get some.