Inside History on Instagram: "Visual-effects artist Ken Ralston allegedly tucked a sneaker into one of the space-battle shots during the Battle of Endor—a tiny inside joke hidden in the middle of the chaos. Fans claim it appears right after the Executor crashes into the second Death Star, in a fast-moving model shot where a white gym shoe briefly blends in with the ships. Ralston later confirmed he slipped it in “just for fun,” and many believe the gag still survives in older prints of the film.