Laurence Sterne’s 18th-century masterpiece The Life and Opinions of Tristram Shandy, Gentleman is still the best of all avant-garde novels, and most of the fun of watching this screen version is wondering how writer Martin Hardy and director Michael Winterbottom will adapt what’s plainly unadaptable. They manage to anticipate almost every possible objection (even finding a cinematic equivalent for Sterne’s purposely blank page). This farce eventually runs out of steam, devolving into a protracted docudrama about actor Steve Coogan (who plays the title hero as well as his father), but until then this is a pretty clever piece of jive. With Rob Brydon (as Toby), Dylan Moran (as Dr. Slop), Keeley Hawes, and Shirley Henderson. R, 94 min. (JR)