Apollo 15 astronauts throw metal object, makes sound 14 seconds in

We know Star Wars is fake because of the sounds of the fighters in space. So why was there sound on the moon? From NASA’s video library of Apollo 15 at when astronaut James Irwin has removed a replacement ECS Primary LiOH canister from the right end of the MESA and, after removing and discarding a “band“ puts it in the EVA-1 pallet. it is when he “discards“ the band by throwing it up against the lunar lander that we hear it strike the lander - in the vacuum of space. 14 seconds in