Galaxy Quest manages to both BE a science fiction movie, and to mock the genre (especially Star Trek) -- but to mock it more lovingly and aptly than any parody ever. These lines from the movie say it all:
Fan: But I want you to know that I'm not a complete brain case, okay? I understand completely that it's just a TV show. I know there's no beryllium sphere...
Actor who plays captain: Hold it.
Fan: no digital conveyor, no ship...
Actor who plays captain: Stop for a second, stop. It's all real.
Fan: Oh my God, I knew it. I knew it! I knew it!
Til
Fan: But I want you to know that I'm not a complete brain case, okay? I understand completely that it's just a TV show. I know there's no beryllium sphere...
Actor who plays captain: Hold it.
Fan: no digital conveyor, no ship...
Actor who plays captain: Stop for a second, stop. It's all real.
Fan: Oh my God, I knew it. I knew it! I knew it!
Til