Nostalgia tripping is risking becoming it's own subgenre of film. It's a golden age for nerds: comedic geniuses like Simon Pegg riff on 80s pop-culture for hours and make watching it enjoyable. This is old hat for Pegg, who starred with Paul co-writer and co-star Nick Frost in Spaced so many years ago. Spaced pulled from the same bag of "Wars and Trek" references, and like in Paul, it didn't let the in-jokes ruin the comedic chemistry, plot and character development. Contrast this with Fanboys, another exercise in sci-fi reverence that was steeped too deep in arcana and lacked comedic wit. Fanboys featured a cameo by Seth Rogen, who gives the charming the voice to the titular alien.