…keeping the nozzle pointed in a safe direction.

…after he attached the shoulder thing that goes up…

There was a similar Simpsons gaff from a few years back where someone threateningly racks a double-barrelled shotgun. Honestly, I’m not sure whether these are displays of ignorance or in-jokes about movie conventions.

But you’ve got to hand it to the Korean animators for their unquestioning taking of direction.