If you've dreamt of watching Al Pacino mumble-sing "It's Only a Paper Moon" to a fluffy white feline, this is your movie. When talking to people, such as his embittered, semi-estranged bigshot son (Chris Messina), or a clearly smitten bank clerk (Holly Hunter), Manglehorn seems scarcely less distracted. It's hardly an unshowy performance, but as a display of technical virtuosity, it's surprising and rangy from an actor frequently accused of self-parody in recent years.