For director Jon M. Chu, the crafting of G.I. Joe: Retaliation's massive action centerpiece tapped into all of his abilities. First, the scene was penned by Rhett Reese and Paul Wernick, but the script was more of a launchpad for Chu's vision. "It wasn't as big as it became," Chu says of the script. "I would take their ideas and sort of put them aside. I'm going to redesign. Then I'd go back and ask, 'Okay, where did they achieve greatness and where did I achieve greatness?'"