Movie Quote from Galaxy Quest

Jason: You're not gonna die on the planet, Guy.
Guy: I'm not? Then what's my last name?
Jason: It's... uh... uh... I don't know.
Guy: Nobody knows. Do you know why? Because my character isn't important enough for a last name, because I'm gonna die five minutes in!
Gwen: Guy, you have a last name.
Guy: DO I? DO I? For all you know, I'm Crewman Number Six! Mommy... mommy..