by POPSUGAR Entertainment 13

In case there was any doubt that Knocked Up must have had the most fun movie set in recent history, here's more proof: yet another fake on-set fight video. This time, it's not Michael Cera who's been cast in (and fired from) the Seth Rogen role — it's James Franco. He's supposed to whisk Katherine Heigl's character off for a romantic lunch, but instead he launches into a dull story about a dog, leading to a screaming fight between him and director Judd Apatow that covers the demise of "Freaks and Geeks" and pits Apatow against Spider-Man director Sam Raimi. To watch the video, read more

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