Avengers: Age of Ultron's Bruce Banner has a master plan for that inevitable day when he completely losses control.

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That day will come to pass during the Avenger's battle against Ultron, and hopefully the scientist's contingency plan will work (although not before he causes some serious insurance headaches in Johannesburg).

"Hulk is the kind of wild card. He's the loose cannon of the group. He's more like an atom bomb. You could guess where he's going to go but he could go either way," Mark Ruffalo (Bruce Banner/Hulk) told Empire. "I think that there is, obviously, the day when everyone expects it to go wrong and that day comes. And they're ready. And Bruce designed the contingency plan."

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This plan will clearly involve a little brainstorming from the Science Bros., a collaboration that will result in Iron Man's (Robert Downey Jr.) Hulkbuster armor. It's a device the billionaire may need to use often in the future as two different personalities wage war inside Banner.

"There's a battle going on between these two opposing egos that live inside him. He's definitely worried that the day is going to come when the Hulk gets the best of him, and maybe won't release him, maybe won't give him back," Ruffalo explained. "The Hulk knows this too. There's a moment in here where he, begrudgingly, decides to go back to Banner."

Whoops. That last bit does not bode well for the gamma soaked scientist.

Find out more when The Avengers: Age of Ultron enters theaters on May 1. Click the video below to see a trailer.

Tags: The Avengers 2 Avengers: Age of Ultron Movies Marvel