Other mistake: Jacob takes Cal shopping. In the shot during which Jacob says to Cal "the skin under your eyes is starting to look like Hugh Hefner's ball sack," the film is flipped and the viewer is watching a reverse (or mirror) image. This is revealed principally by the fact that the emblem on Cal's Polo shirt is on the right side of his chest as opposed to his left.
JW Pepper
13th Dec 2012