All excellent choices, especially Dorman's "toy plane" bombshell.
But for my scene would be Townes' trying to fire up the Phoenix, much to the consternation of Dorfman and the number of cartridges Townes' was getting through until finally the engine fires up!
When is old news gonna be old news?
Arnold Vinick (The West Wing)

Me too with the scene where Dorfman's exact vocation is discovered.

The first scene I thought of when I read your post was the confrontation scene you mentioned about the water. Then you reminded me of the surreal, paradigm shift scene about toy airplanes. But I think my fave scene is when Towns goes to the Attenborough character and makes it up to him.

I love the scene when Borgnine has to be restrained and he reacts like a huge, violent 4-year-old. Screaming, crying and kicking.
May I bone your kipper, Mademoiselle?

When Dorfman throws that HUGE wrench at Townes just missing his head. I always wondered if it was a rubber prop because it sure looked and sounded real.
But my VERY favorite scene is the smokin hot belly dancing.

Starting the engine.

My favorite scene is the one where Towns and Moran find out that
Dorfmann is a "toy" plane designer..
Just once, I'd like someone to call me sir without adding 'you're making a scene' ~H Simpson