At the premiere this week of Couples Retreat, Vince Vaughn told me the film -- which is the first he's taken a writing credit on -- came in part from his own experiences, where he found "the funny is an overcommitment to the absurd" in relationships and marriage counseling. Jon Favreau, who wrote the first draft of the movie before starting work on Iron Man 2, said Vaughn wasn't afraid to suggest something different while shooting, something Kristen Bell seemed to enjoy. Watch the video for our conversations and my report: