Indeed - LoB is a tough one to beat.
Another classic would be Airplane!
So many quotable lines and the late great Leslie Nielsen.
[as the plane prepares to take off]
Hanging Lady: Nervous?
Ted Striker: Yes.
Hanging Lady: First time?
Ted Striker: No, I've been nervous lots of times.
OR...
Rumack: Captain, how soon can you land?
Captain Oveur: I can't tell.
Rumack: You can tell me. I'm a doctor.
Captain Oveur: No. I mean I'm just not sure.
Rumack: Well, can't you take a guess?
Captain Oveur: Well, not for another two hours.
Rumack: You can't take a guess for another two hours?