Nexus-7, you should give the first Poltergeist a shot. It hasn't held up incredibly well, but for a PG-rated movie, it's pretty intense. Fortunately, only two sequels were produced, as well as a crappy Showtime television show that was similar in name only. I should have written down the exact times when the memorable scenes occur in Poltergeist II, just so you or anyone else wouldn't have to waste their time suffering through the whole thing. Then again, there's always youtube!
Natalia, I completely forgot that Lara Flynn Boyle was in Poltergeist III! See, that's how unmemorable it was for me! After checking around, it seems that this was her first film role. The concrete scene rings a faint, distant bell, so maybe I should revisit the flick (or at least the scene). But, truth be told, I'm afraid to. Very, very afraid.