Road trip movies are both a rich seam of comedy history and a horrifying one. For every classic, there are ten frat boy comedies with as much originality as a joke about airplane food. In other hands, Grandma may well have ended up with a title like Bad Grandma and ended up heading down that route. In the hands of writer-director Paul Weitz, this story of a woman trying to help her granddaughter raise money for an abortion is a touching and real piece of cinema.