Galaxy Quest/Trivia

Casting Gag: Sigourney Weaver, Action Girl from the Alien film series playing a Bridge Bunny.
Enforced Method Acting: When the crew first arrives on the ship and Guy screams in terror, Sigourney Weaver nearly jumps out of her skin in shock. Apparently the director (purposely) didn't tell her that that was about to happen.
Fake Nationality: Parodied with Arab-American Tony Shalhoub playing Chinese-named Fred Kwan/Sgt. Chen, a reference to Japanese-American George Takei playing totally not Japanese-named Sulu on Star Trek: The Original Series, Englishman Patrick Stewart playing French Jean-Luc Picard on Star Trek: The Next Generation, and Canadian James Doohan playing Scotty.
- Kwan isn't even his real name. He visibly squints for the camera in an attempt to make his eyes look Asian, which doesn't really help as Shalhoub's eyes naturally curve downwards.
Hey, It's That Guy!: Justin Long, the Mac Guy (from the "I'm a Mac, and I'm a PC" commercials) in his first film role as one of the Galaxy Quest fanboys.
- Also Dwight Schrute (Rainn Wilson) as one of the aliens! And Ted Buckland (Sam Lloyd) as another!
  - And Crewman Daniels as a third!
- And Adrian Monk!
  - He even mentioned how clean the floor of the space ship was.
  - Though the trope applied at the time, audiences would have recognized him as the Funny Foreigner from Wings.
- Alexander is Hans Gruber!.
  - And the Sheriff of Nottingham, and the Metatron, and Severus Snape...
    - (You are reading this in Mr. Rickman's bored voice)
- Daddy Mars is Mathazar, the head alien!
  - He's also That archaeologist who got captured with Daniel Jackson in Honduras!
- Look! One of the Kids in the Hall!
- Are you people kidding?? What about Ellen Ripley?!
  - What about ~~Dana Barrett~~ Ellen Ripley?
- And you all forget Tim ~~Allen~~ "The Tool-Man" Taylor and Buzz Lightyear.
- And Sarris himself is Giles' least favorite chaos warlock, Ethan Rayne. He's also Zaeed Massani
- Listen closely, Garrus is in this film!
MythBusters: Adam, Grant, and Tory all did model work for the film.
Name's the Same: A very different Jason Nesmith is a singer-songwriter, and son of The Monkees' Michael Nesmith.