Big Giant Head (Introducing himself to Vicki): Hello.
Vicki: Well, hi there.
Big Giant Head: I'm a rocket man, you know.
Big Giant Head: Can I help you jettison your pants?
Dick: Families don't refer to each other by rank. They use more familiar terms like 'you' or 'bastard' or... 'you bastard'.
Big Giant Head: (to Tommy and Harry) You two... you're going to bathe me.
Tommy and Harry: ...yes, sir.
(Big Giant Head walks away)
Harry: I call the top half.
Tommy: Screw that.
Big Giant Head: The yelling will cease and the killing will commence!
Sally (to Big Giant Head): So how was your trip, sir?
Big Giant Head: Horrifying, at first. I looked out the window and... I saw something on the side of the plane.
Dick: The same thing happened to me!
Sally: So how was your trip, sir?
Big Giant Head: Horrifying, at first. I looked out the window and... I saw something on the side of the plane.?
Dick: The same thing happened to me!?
This is referring to "Nightmare at 20,000 Feet", a story about a frightened airline passenger who sees a gremlin on the wing of the airplane he's flying on. William Shatner (Big Giant Head) played the lead role in that 1963 episode of the The Twilight Zone, and John Lithgow (Dick) played the lead role in that story in Twilight Zone: The Movie (1983).
Big Giant Head: I'm a rocket man you know.
This alludes to William Shatner's reading of Elton John's "Rocketman" during the 1978 Science Fiction Film Awards. The performance had a Kirk-like delivery.