Family Guy: The Lost Episode, Peter and the Holy Grail

You go off to visit the all drunken Drunken Clam. So, you rent a lot of diving gear and dive in the water to find "The Drunken Clam". Eventually, you start following a trail of broken beer bottles that lead you to him. You see "The Drunken Clam" and he is hiccuping violently. You ask "The Drunken Clam" is he knows where the Holy Grail is. The clam replies, "Orange...*hiccup*...hippopotamus...*hiccup*...More Dos Equis!"
You swim there for a while and then decide to...