The Beatles were actually reluctant to have this film done, hating the tv cartoon based on them. The voices aren't them at all, except for the singing. However, when they saw the finished product they were impressed and came up with that epilogue to the film as a sort of good-will offering.
Paul: Senile delinquents.
John: It appears to be a group of fellas.
Paul: Look, it's a school of whales.
Ringo: They look a little bit old for school.
Paul: University then.
Ringo: University of whales. {University of Wales pun?--me}
John: They look like drop-outs to me.
John: Break the glass.
George: We can't!
Paul: It's Beatle-proof.
John: Nothing is Beatle-proof!
Ringo: Look, it's Father Christmas!
Paul: That's not Father Christmas, that's Father Time.
Ringo: How'd you know that?
Paul: Well, I read it in a book.
John: It's blue glass.
George: Must be from Kentucky, then.
Chief Meanie: A thing of beauty; destroy it forever!
John: Hey Ringo, I just had the strangest dream.
Ringo: I warned you not to eat on an empty stomach.
Chief Blue Meanie: It's no longer a blue world, Max. Where can we go?
Max: Argentina?
Now tell me that isn't a Nazi reference!