Movie scenes recalled by a single word

Sunset Boulevard

Yep!

…extra padding so Discourse will accept my post…

Woodchipper.

Adriaaaan…!

Ax, maze, typewriter, bar, tricycle.

Dr. Strangelove.
But I thought the OP wanted a specific scene, not just a movie.
If so, the most memorable scene where this is mentioned is when Mandrake meets Ripper for the first time (as I recall).

Stella!

Streetcar Named Desire

Sleepless In Seattle

Rocky

Bueller?

Frankly

TOGA! TOGA! (does it count if the word is repeated?)

Might as well say “Zit.”

Get it?

LOL I lived in that era
Gotta be Animal House

Full Metal Jacket

Empire State Building

If not, Sleepless In Seattle

Maybe, An Affair To Remember

“Otisburg?”

Parsecs

Upstart.

Canapes (pronounced can-a-peas)