Zombies — there’s just no stoppin’ ’em. On a day crowded with debut releases, the undead comedy Zombieland scared up an estimated $9.4 million on Friday for the number one spot at the box office, en route to a possible three day opening gross of $24 to $28 million. It was also another good day for 3-D animation: Cloudy With a Chance of Meatballs landed at number two with $3.7 million, and the Toy Story/Toy Story 2 double-feature in 3-D banked $3.2 million for third place. The Ricky Gervais comedy The Invention of Lying pulled in a better-than-expected $2.5 million for fourth place, besting Drew Barrymore’s directorial debut Whip It!, which skated to $1.6 million for sixth place. (The sci-fi thriller Surrogates dropped to fifth place with $2.2 million.) Finally, the Michael Moore documentary Capitalism: A Love Story expanded to almost 1,000 theaters, earning $1.5 million in cold, hard capital for seventh place. Be sure to check back here tomorrow for a full report on the weekend box office.