Sadness and dark comedy permeates Big Fan, but one particular detail encapsulates. Early in the movie, we see Paul (Patton Oswalt) call in to his favorite sports radio show to discuss the New York Giants — and consulting from a notepad of observations we saw him writing down with great intensity in previous scenes. Not only does he call into this radio show (from his childhood bedroom, no less) like it’s his job; he does it working from a script. Like a lot of the movie, this realization is tragic, funny, and heartbreaking all at once. If you’ve ever been obsessive about anything — movies, say? — certain notes of Big Fan may ring uncomfortably true.