In the evening I went to see "Disturbia," about a disturbed kid (he sees his Dad die at the start of the film) who's been placed under house arest and, out of boredom starts to observe the neighbors. Most of it's tame but he realizes that he fancies the new neighbor on the block and that David Morse (who I still think of as being in St. Elsewhere 20yrs after I saw it) isn't all he's cracked up to be.
He then goes into overdrive observing the guy, trying t build a case against him. Morse figures out he's being watched, however, and so the two play a cat and mouse game trying to figure out what is going on with the other. This takes a little too long I think as they build up to the eventual conclusion of the film.
I'm surprised the film is a PG-13. When the guy is watching the girl he fancies, it can feel a little creepy and voyeuristic in places but because it's a PG-13 it can't really gwt twisted enough to get scary. Teenage girls are probably the only people who'll get scared by that film.