Continuity mistake: The head of Mega-Maid mysteriously shrinks in size. After Spaceball-1 transforms into Mega-Maid, the head is gigantic enough for a Winnebago to fly through for a considerable length of time. However, later on in the film, after the head has been jettisoned and crashed on a beach, the head is only big enough to hold a few dozen people. This can be determined by the size of the people coming out of her nose.
Dark Helmet: Careful, you idiot. I said across her nose, not up it!
[The gunman turns around and is cross-eyed.]
Gunman: Sorry, sir. I'm doing my best.
Dark Helmet: Who made that man a gunner?
Cross-eyed gunman 2: I did, sir. He's my cousin.
Dark Helmet: Who is he?
Col. Sanders: He's an asshole, sir.
Dark Helmet: I know that, what's his name?
Col. Sanders: That is his name, sir. "Asshole." Major Asshole.
Dark Helmet: And his cousin?
Col. Sanders: He's an asshole too, sir. Gunners mate, Second-class Philip Asshole.
Dark Helmet: How many assholes we got on this ship, anyhow?
Everyone on the ship: Yo!
Dark Helmet: I knew it, I'm surrounded by assholes.