These dinosaurs have legs. Jurassic World topped the domestic box office for a third straight weekend with $54.2 million, squeaking past Inside Out, which only dropped 42% in its second frame for $52 million — a terrific hold for the Disney/Pixar hit. It was the second three-peat of 2015 after Universal’s other juggernaut franchise Furious 7, which cruised along at No. 1 for four consecutive weeks in April.