So I watched "Iron Sky" the other night, and it's amazing!
It's a Finnish/Australian/German production that's starts with two astronauts landing on the moon to promote a Sarah Palin-esque politician's presidential campaign, and soon discover that on the dark side of the moon there's a huge Nazi base where the Nazis have been hiding and waiting since WWII, and are of course planning to attack the earth.
It has some of the sharpest comedy I've seen laced with silly stupid slapstick and nonsense.
At one point the movie mirrors the famous "Downfall" scene shot-by-shot with Faux-Palin's campaign manager.
It's on Netflix - do yourself a solid and watch it.