A new publicity photo - the first, in fact - from Paranormal Activity 4 hit the web today featuring a teenage girl and an ominous child lurking in the doorway. As is usually the case with these films, we don't get much before their release, so we do not know who the girl is, moreover, why she's being stalked by a menacing runt. The film opens October 19th. We'll have answers then. Click here for some teaser videos.