As expected, Couples Retreat dominated the box office Friday, pulling in an estimated $12.3 million for the day. The numbers portend good things to come this weekend for this Vince Vaughn, Jon Favreau-starring comedy. At this rate, the film should gross in the high $20 million range for the three-day frame. Sony Pictures’ Zombieland and Cloudy with a Chance of Meatballs took the number two and three spot with Friday’s grosses at $4.7 million and $3.1 million respectively.

The big surprise of the weekend was the activity from Paramount’s uniquely marketed Paranormal Activity, which grossed an estimated $2.5 million for the day. The number is astonishing considering the R-rated horror film only played in 158 theaters, putting its per-screen average at an unbelievable $15,975. (As a comparison, Couples Retreat per-screen number is $4,110.) Also, now that over 1 million people from around the country have logged onto the website to request it play in their town, the film will open nationwide beginning Friday, Oct. 16. Quite impressive for a film that cost only $11,000 to produce.

Rounding out the Top 5 was Disney’s Toy Story/Toy Story 2 3-D experiment which garnered an additional $2 million for the day. Check back here tomorrow for the weekend’s Top 5.