Keira Knightley and James McAvoy in AtonementATONEMENT

It seems that lately, whenever I leave the film version of some well-regarded or beloved novel - be it No Country for Old Men or Gone Baby Gone or one of the Harry Potters - I feel a nagging guilt for not having previously read the books they're based on, and I'd consider remedying that if I wasn't concerned about being subsequently disappointed by the adaptations. (Or, in the case of most of the Potter movies, even more disappointed.) After seeing director Joe Wright's Atonement, though, I was completely annoyed with myself for being unfamiliar with author Ian McEwan's 2001 precursor - I was dying to understand what, when the end credits rolled, inspired a majority of my fellow audience members to applaud.

RentRENT

During its first 10 minutes or so, the film version of Jonathan Larson's Tony- and Pulitzer Prize-winning musical Rent is so thrilling you might want to applaud. As the opening credits unfurl, the movie's cast - all but two of whom reprise their original stage roles - sings Rent's signature number, "Seasons of Love," on a bare stage in dramatic downlight, and performs with fervent, passionate joy.