While shooting scenes with Forest Whitaker and 'Garcelle Beauvais-Nilon' in an LA neighborhood, the arrival of Britney Spears halted production. She was visiting a friend in the house next door, trailed by several shouting paparazzi photographers.
The central idea for the film came from an article in the L.A. Times. In addition, the writers were influenced by a friend, who related stories about how students from a Chicago school district brought guns to school, not to use them inside, but because of the dangerous neighborhoods they live in or walk through every day.
When Carter grabs Jay as he is putting his gun behind the grate, Jay is wearing a toque and heavy jacket. In the next scene when he is being dragged down the hall, Jay isn't wearing the jacket or the hat.
When David is drawing the tattoo on Tally's leg, she takes her glasses off and places them beside her. In the next cut her glasses are on, and in the next cut her glasses are off.
During the scene in which David fights with his mother about moving his brother's bed, when David leaves the bedroom the back of his shirt is spotty with sweat. When he leaves the house a few moments later, his shirt is dry.