Jeremy Renner, Elizabeth Olsen, Paul Bettany, Sebastian Stan and

Competition is nothing new for the stars of Captain America: Civil War.

Jeremy Renner was a guest on NBC’s The Tonight Show Wednesday, where the actor recalled shooting the “giant sequence” where the Avengers were “fighting together”—and, in some cases, each other—at an airport. The superheroes were divided into two teams: Hawkeye (Renner), Captain America (Chris Evans), Scarlet Witch (Elizabeth Olsen), Ant-Man (Paul Rudd), Falcon (Anthony Mackie) and Winter Soldier (Sebastian Stan) on one, and Iron Man (Robert Downey Jr..), War Machine (Don Cheadle), Vision (Paul Bettany), Black Widow (Scarlett Johansson), Black Panther (Chadwick Boseman) and Spider-Man (Tom Holland) on the other.

The individual battles were shot at separate times. “You saw everybody’s costume. Half the people were working; the other half weren’t. It was kind of like being in a locker room at a football game. You see, like, ‘Oh, that’s what Falcon’s outfit looks like,’ and how much crap he’s got to put on. You start to understand the pains that people have to go through to get in these costumes,” Renner said, joking, “I have a zipper. I can go to the bathroom whenever I want!”

“Paul Bettany—Vision—that poor guy’s in the makeup chair longer than he’s on camera the entire movie,” he said. “He’s just always in the makeup chair all day—taking it on, taking it off.”