“Every character is perceived in a certain way and then every character breaks,” Josh Brolin said of playing a parent of a missing elementary school-age boy in “Weapons.” Courtesy of Warner Bros. Pictures

LOS ANGELES — It’s August, and horror and humor came to play.

In a month that’s long been known to let edgier movies thrive, Zach Cregger’s highly anticipated horror film “Weapons” did not disappoint, topping the box office during its debut weekend with $42.5 million domestically from 3,202 theaters. It made $70 million internationally.

The film’s success also handed its distributor, Warner Bros. Pictures, the seventh No. 1 opening of the year, and became the studio’s sixth film in a row to debut with over $40 million domestically.

“Freakier Friday,” Disney’s chaotic sequel to th

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