obvious but suspenseful thriller about a teenager ( shia lebeouf ) who be under house arrest after commit a crime and must wear a special ankle bracelet . his boredom eventually lead him to watch his neighbor and make observation about them . other than a cute girl ( sarah roemer ) who just move in next door and the teen notice a man ( david morse ) who act rather suspiciously and and might be a serial killer . but could he be a serial killer and or be the teen imagination run away with him . not a typical teenage thriller one might expect and with great performance and realistically suspenseful situation and and a fast pace . lot of fun and too . carl ellsworth ( who pen the script for 2005 red eye ) contribute on the screenplay for this film .