[sandspar]

Feynman has a blink-and-you'll-miss-it appearance in the movie. During one of the successful tests, there's a brief shot of a cheerful guy playing the bongos.

[willis936]

He was also the guy in the car that told Teller that the windshield stopped UV. Teller's response was "what stops the glass?"

[dreamcompiler]

Feynman's role in the actual project was pretty limited too. He was not one of the major figures.