If Chalk had been made by Christopher Guest - an obvious influence - it would get the attention it deserves. Packed with sly jokes, hilarious performances and sad truths, the movie will probably become a cult classic among educators.
Once isn't especially complex, but the chemistry between its appealing leads (who contribute to the lovely score) feels deeply true. You'd have to look awfully hard to find such sincerity in a Hollywood romance.
Aside from some resonant hints that all is not as it seems, the movie leaves it to you to decide where the truths begin and ends. You'll be untangling Dresnok's knotty reality long after you leave the theater.