DuracellEnergizer said:

I'm confused. Is Artoo a cyborg, now, or a muscle man with a trash can worn over his head?

Don't get duped by the clever editing. That blast on C-3PO is an exit wound. He's been shot in the chest before, so he'll live, as R2 is assessing in the second frame. R2 is pulling out his muscle man accessories because his normal ones aren't sufficient to finish the job. His little saw blade can't cut through metal, his zapper doesn't have the voltage, and his grabber arm can't beat the life out of a damaged robot. And that stormtrooper? Clearly just an action figure superimposed over the original images.