Actor who stripped down: Jason Segel
Why they're fully nude: The mistaken belief that his girlfriend is in the mood for love.

Men have been dumped plenty of times on screen. But never in as pathetic a way as Peter Bretter (Jason Segel), boyfriend to the eponymous starlet (Kristen Bell) in Forgetting Sarah Marshall. Which is to say, while he's stark raving naked. And is completely blindsided.

Segel, who also scripted the film, says the scene was inspired by a real-life experience. Talk about writing what you know. Ouch!