Scratch Cassavetes hasn't actually made his name with chuckle riots. The child of John Cassavetes, he's most likely most popular for coordinating such teary melodramas as the enormously effective "The Notebook" (2004) just as "My Sister's Keeper" (2009), in which charming Abigail Breslin looks for liberation from her folks so she never again needs to help keep her leukemia-stricken sister alive. (Bring tissues.) Watch here at…