What the fuck?

A soldier in a gas mask and tactical gear stands in a fiery, smoke-filled environment, holding a rifle as the camera moves around him. The scene shifts to a close-up of hands loading a bullet into a revolver, followed by a view of a soldier's helmet and weapon in a dark, industrial setting, then to a person's feet walking in a dimly lit space, and finally to a close-up of a hand holding a revolver in a dark environment with a single light source above.