movies with 'happy endings' that are really fucked up when you think on them

re ET, AI, Dune, I wonder who would win in a three-way shootout of movies with ostensibly happy but fucked up endings between Spielberg, Kubrick, and Lynch?

Nicole Kidman telling Tom Cruise, "Git yer boots on cowboy, it's humpy pumpy time!" feels like a top contender...

the parents in Time Bandits sucked, so them getting vaporized and Kevin being free to do whatever he feels like IS a happy ending, we loved it as kids