Paranormal Activity 2 (2010)

Haunted happenings are afoot again in the ghostly prequel Paranormal Activity 2 (2010). In this second installment of the sleeper-hit franchise, family man Daniel Rey (Brian Boland) installs security cameras in his home after what he thinks is a series of break-ins. But as the cameras roll, it becomes obvious that the Reys have much bigger problems than a cat burglar. Invisible, demonic problems with superhuman strength- and designs on the couple’s baby. Luckily, before fright night comes bikini season in a scene where lady of the house Kristi Rey (Sprague Grayden), her sister Katie (Katie Featherston) and stepdaughter Ali (Molly Ephraim) go for a sexy bikini-clad dip in the family’s paranormal pool. That strange tingling sensation in your jeans? That's what we call Paranormal Sacktivity.