After Spaced, Shaun of the Dead and Hot Fuzz, it's widely believed that Simon Pegg can do no wrong; appearing as if custom-made to test that contention is the new comedy Run, Fat Boy, Run. Run, Fat Boy, Run gets approving nods from comedy connoisseurs when you mention Pegg's in the lead; mention the presence of David Schwimmer in the director's chair and their expressions change subtly ...

After the success of Friends, Schwimmer could have devoted himself to any number of pastimes -- stick-fighting, model rocketry, leisurely laps in a Scrooge McDuck-style pool of Sacagawea dollar coins. Instead, Schwimmer starred in Duane Hopwood -- which saw Schwimmer playing a barely-functioning alcoholic, as if a brief crawl through the gutter would get the Ross off him -- and here he makes his directorial debut.

Run, Fat Boy, Run stars Pegg as Dennis; five years ago, Dennis left his pregnant girlfriend Libby (Thandie Newton) at the altar. Now, he's living in a basement flat, working as a security guard, occasionally being a good dad to his son Jake (Matthew Fenton) -- and confronted with Libby's relationship with Whit (Hank Azaria), a well-to-do, can-do American. In a moment of weakness -- motivated by pride, or idiocy, or both -- Dennis reacts to Whit's bragging about his upcoming athletic endeavors by saying that he, too, is going to run the London Marathon ...