A movie I love is Kenneth Longergan's "Margaret." After "You Can Count on Me," Lonergan was clearly able to do whatever he liked. He had so much support. The cast of "Margaret" is ridiculously starry: Oscar winner Anna Paquin, Oscar winner Matt Damon, Oscar winner Allison Janney, Oscar nominee Mark Ruffalo, Tony winner John Gallagher, Tony winner Matthew Broderick, Oscar nominee Jeannie Berlin, Globes nominee Kieran Culkin, indie darling Rosemarie DeWitt. Martin Scorsese chipped in. Here's the story. Lisa, a volatile teenager, is walking down a Manhattan street. She sees a bus driver, Mark Ruffalo, in a fun hat; she wants to chat with him about the hat. Ruffalo--clearly flattered and aroused by a young person's interest--takes his eyes off the road. And a pedestrian ends up dead. This is too much for Lisa to handle. Really, how could anyone cope? She has some culpability here. And what should she say to the police? If she tells the truth abou...