Thanks to the website Stitch Kingdom, we now have a detailed description of the Avengers: Age Of Ultron fight scene between The Hulk (Mark Ruffalo) and Tony Stark (Robert Downey Jr.) in his newly-created Hulkbuster armor. The clip was shown on Thursday at Disney's annual shareholder meeting.
The scene opens with an armored police vehicle arriving on the scene. An incredibly angry and destructive Hulk is witnessed tearing up the streets, destroying cars and spreading all-out panic. Police, heavily armed with machine guns, openly fire on the Hulk to no avail. In the distance comes Iron Man, flying at super speed to the scene. ‘Hold your fire,’ he commands to the responding teams below. He is flanked by large metal objects that speed along through the air with him, keeping up every step of the way. We cut back to the menacing Hulk and all of a sudden, a large steel (?) surfboard-shaped object slams itself down in the pavement in front of him. Then another. And another. Before you know it, Hulk is trapped inside a giant, solid metallic ‘box.’ At least, that is, until Hulk smashes free and then continues his rampage. And then, it assembles — piece by piece — the Hulkbuster, almost in Mark 42 fashion. ‘The witch is messing with your brain,’ Stark tells Hulk. ‘You’re smarter than her, you’re Bruce Banner.’ This yields an even angrier response from Hulk and it’s on. Hulkbuster vs. Hulk.
The Hulkbuster usually seems to have the upper-hand, as they drag each other through the streets, tearing up the pavement. At least until Hulk ends up on the Hulkbuster’s back, impaling the shoulder with a traffic light pole. ‘Dick move, Banner’ responds Stark as they continue to fight. Then the damaged pieces of the Hulkbuster fall off and are quickly replaced with new parts. Different parts. And now Hulkbuster is atop Hulk, Stark treating Hulk’s head as a punching bag, literally pounding Hulk’s head into the pavement over and over and over (much to the amusement of the audience). ‘Sleep, go to sleep’ chants Stark, but spoiler alert: it doesn’t work. Then, one of the replaced parts of the Hulkbuster, the arm missing a hand, wraps itself around Hulk’s arm and sucks him in and Iron Man takes flight, toting Hulk by the arm.
Based on this description we can now confirm what most of us had already suspected, which is Scarlet Witch/Wanda Maximoff (Elizabeth Olsen) and her powers are behind The Hulk losing control. It's also interesting that Iron Man refers to Wanda as a witch.
Avengers: Age Of Ultron arrives in theaters May 1, 2015.