Beatles Cartoon - It Won't Be Long

From 1965. At a Miniature Garden in Japan, Dr. Ah-So demonstrates to his colleagues his new chemical, poured into a lake, which causes anything dunked into the lake to be instantly miniaturized (temporarily). Then the Beatles arrive at the lake to have a picnic, and John goes in for a swim, and gets shrunk down to tiny size! What will happen to him?? At least one thing is certain - It Won't Be Long!