Miguel Arteta’s Cedar Rapids is a charming, warm-hearted comedy about an innocent man’s descent into debauchery. Given its small-town setting, the ensuing antics have a manic energy you wouldn’t expect. The cast, all chosen perfectly, is also full of surprises. Ed Helms gives the best performance of his career as a man who is so hapless you can’t help but like him. Many of the movie’s gags would fit perfectly into a mediocre gross-out comedy, yet Arteta and screenwriter Phil Johnston are more interested in character development than their contemporaries.