An amusement park owner hires an engineer to design frightening rides and works him to death. The engineer's ghost returns and takes the park owner on a deadly roller coaster ride.; An alien commander is sent to Earth to prove his courage by capturing three humans, but he accidentally takes statues of George Washington, Abraham Lincoln and Teddy Roosevelt.; An evil duke seeks the secret of eternal youth, and an old man in Egypt turns him into a mummy.; A selfish man builds a bomb shelter only for himself, but when a false alarm panics him he finds himself locked in for a month without a can opener to open his food.