I'm curious how the "power walk" originated, where characters walk inline (or sometimes in a triangle with the middle furthest towards the camera) towards the camera.
What was the first use? Has it changed over time?
It was a common practice in the 1930s to stage publicity photos with the cast of the film walking towards the camera, usually arm in arm. This might have been featured in the trailer, but never in the final film. Here are Jean Harlow, Clark Gable and Myrna Loy in a photo, probably for WIFE VS. SECRETARY (1936).