North By Northwest - It's Gonna Be Loud!
During the scene at the Mount Rushmore visitor center - when the blonde is just about to shoot Cary Grant a little boy in the background sticks his fingers in his ears because he knows the blanks that will be fired are going to be loud. Obviously took a few takes before the final "shot" was printed!
Easier with frame by frame on vcr
on 10-19-1999 and