An honest and sharply drawn account of the eternal questions of ego, friendship, and sacrifice in the comedy world.

It’s funny and inspiring and harsh and depressing. It’s steeped in existential dread. I don’t know how Birbiglia pulled it off, but he gets the minutiae of an improv-comedy show thrillingly right while using the form to build a kind of allegory of the corrosive effects of capitalism.

A delicately wrought ensemble piece with first-rate turns by Gillian Jacobs, Keegan-Michael Key, and Birbiglia himself, Don't Think Twice scrutinizes its playful setting and finds an ideal entry point for exploring creative desperation.

Birbiglia films what he knows, offering ample and intricate scenes of improvisations performed onstage, along with an insider’s view of the industry.

Portraying a cutthroat business in which little is “fair,” Don’t Think Twice acknowledges the bloodshed, but applies the razor with enough empathetic delicacy to earn its cautiously upbeat fade.