Everyone we know who attended Catholic school or had to endure catechism class has horror stories to tell about the nasty nuns. But these same people have been screaming with glee over Patti Hannon, who plays Sister, the ball-busting bride of Christ charged with our ecumenical upkeep in Late Nite Catechism Parts I and II. Both plays are written by Maripat Donovan and directed by Marc Silvia, and are running concurrently at Scottsdale Center for the Arts, where the audience pretends to be students of Hannon, who paces the stage, swinging her beads and cracking wise about Christ and his cronies. She's a master at improvisational comedy, which is the hallmark of this frequently hilarious homage to holiness. And that's a good thing, since Late Nite II is really just a prolonged improv sketch, one in which Hannon must lob funny answers to any number of questions posed by the audience. No matter how silly or stupid the question, Hannon is always ready with an answer both amusing and instructive. Late Nite II is irreverent but not irreligious, and always funny, thanks to Hannon's litany of one-liners about good and evil.

Bless you, Patti Hannon, for knowing your way around a sepulcher, and for making us laugh at stuff that used to bug us.