I was watching a movie quite like the paranormal activity movies it starts with two girls sitting on a couch w two guys talking . I'm assuming there on vacation . One of the guys were taping the girls and other guy . Well the girls kind of bribe the guys to go on a self tour of Hollywood murder houses they eventually agree the guys that is and they go by the manson Tate house and a few others but cannot get close enough to get in . They eventually go to a house where if I remember a baby died in the door is open I think and they walk in and start looking around then suddenly they get locked in and the windows were boarded up and they cannot get out . They hear a baby crying and they start disappearing one by one and video taping the whole time until there's just one guy left I think in the closet and the ghosts get him as well . I cannot remember the name of this movie thanks if anyone can help .

Knock Knock 2 (2011) (http://www.imdb.com/title/tt2093044/reference)