What Movie Am I Watching?

If you know what movie this screen capture is from, please
start a conversation about it (or not) ...

MooT Clue-in-the-Trivia: Natalie Wood worked as an assistant behind the scenes of this movie. She typed script revisions, shopped for wardrobe and props, and also appeared, well-disguised, as an extra in some crowd scenes.

Click here to reveal the title ...

The Real Balloon Boy

Six-year-old Peter Michaels in a scene from "Moon Walk" (1963), in which
he plays a mischievous boy who gets loose in a Navy balloon rig.

The question is: what would such a rig be used for???? Astronaut training?

And how to get anyone down ... Hollywood! Sheesh.