In the early morning on the first day of filming, location scouts stumbled upon a grenade sitting in a driveway. Production was stopped while the police and bomb squad were summoned and, after it was determined the grenade was non-explosive and the set cleared, resumed two hours later.
Michelle Trachtenberg and Troian Bellisario are both born in 1985 but in the movie they play sisters with different ages.
In the film, Baltimore is presented as mixed-race. Her mother is Caucasian and her father is African American . She's played by Troian Bellisario who father is white (legendary TV producer Donald Bellisario) and her mother is of African-American/Creole descent (Actress Deborah Pratt of Airwolf fame).
It's shown that Carolina is a lawyer. On the series Castle (2009), for which Stana Katic is best known, her character Kate Beckett was planning on becoming a lawyer, wanting to follow in her mother's footsteps, before becoming a cop in order to bring her mother's murderer to justice.
Same house where Sarah Michelle Gellar is harassed by the killer in Scream 2. Michelle Trachtenberg played Sarah Michelle Gellar's sister on the hit tv show Buffy the Vampire Slayer.