Robert Downey Jr has compared The Avengers to a "complicated pregnancy".
The Iron Man star revealed that the various actors traded off scenes to create the ensemble superhero film.
"It was like a complicated pregnancy," Downey told Fox News.
"What was fun, this bit of WWE superhero tag-team wrestling, is where [Chris] Hemsworth's all beat up and he's been shooting nights, and my character's got the helmet closed, so I'm not there," he continued.
"Then he's flying home to be with the missus, and I'm coming in to do a bunch of scenes with [Mark] Ruffalo. I think everybody really bought into the spirit of the thing."
It sounds to me like everybody involved knew they were making cinematic history and that fact overwhelmed with a sense of awe and joy that dispersed even the slightest hint of discord on the set.