LOS ANGELES (AP) — Fear has taken hold at the box office with a $41.5 million debut for scary movie Paranormal Activity 2, according to studio estimates Sunday.

Paramount Pictures’ follow-up to last year’s micro-budgeted hit Paranormal Activity got a jump on Halloween as fans packed theatres for another documentary-style thriller about a household plagued by a menacing spirit.

Paranormal Activity 2 did nearly half its business on Friday, following the pattern of many fright-flick franchises, which often draw big crowds on opening day then drop off sharply. The movie took in $20.1 million Friday, with receipts falling to $13 million Saturday and $8.4 million Sunday.

The first Paranormal Activity rolled out gradually from city to city in a stealth-marketing campaign that built the buzz for the independently produced thriller that was shot for less than $15,000.

By the time the movie went into nationwide release, it had turned into a horror sensation that went on to become a $100 million hit.

The first movie came out of nowhere, and follow-up films to similar surprise smashes sometimes fall flat, such as The Blair Witch Project sequel. In its publicity campaign, Paramount tried to maintain an air of mystery around Paranormal Activity 2.

“The challenge was to not make the mistake of some other movies of the past, and to treat it as its own very special entity. Even though we went wide with it, we tried to treat it a lot like the first one was treated from a publicity and marketing standpoint,” said Don Harris, the studio’s executive vice president for distribution.

Paramount also had the No 2 movie with the stunt comedy Jackass 3D, which opened in first place the previous weekend. Jackass 3D pulled in $21.6 million, down sharply from its $50 million opening.