Continuity mistake: When the guy walks in on Peter naked in bed, the sheet protecting Peter's modesty is covering him in one frame, and the next moment it has vanished completely.
Forgetting Sarah Marshall (2008)
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Directed by: Nicholas Stoller
Starring: Paul Rudd, Kristen Bell, Mila Kunis, Jason Segel, Russell Brand
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More mistakes in Forgetting Sarah Marshall
Surfing Instructor: When life gives you lemons, just say 'Fuck the lemons, ' and bail.
Trivia: Some details are taken from Jason Segel's life. For example, the naked breakup is based on a similar incident and he was working on a puppet-based Dracula rock-opera.