This is not what could be called highbrow humor. There are far too many penis jokes for that but let's face it; penis jokes are funny. So are vomit jokes and making fun of celebrities with penis and vomit jokes.
And these are the primary topics explored in the film:Penises, vomit, celebrity, drugs, oh and the biblical "End of Days" too. That is a big part of the movie. Penises also wind up incorporated in the biblical apocalypse.
The basic plot of this movie is that Seth Rogen goes to the airport to pick up Jay Baruchel at the airport in Los Angeles. They then proceed to smoke weed and play video games (did I mention there are a lot of drug jokes too?). The conflict in the film first arises when Rogan says they are going to a party at James Franco's house. Baruchel doesn't want to go. He hates Hollywood. He says Franco can't even remember his name.
But they go.
And it is funny. So go see this. If you wait for video it won't be the end of the world but it will benefit from a viewing on the big screen.