Avengers: Age Of Ultron - 32 Easter Eggs, In-Jokes And References
12. The Avengers Hulk Fight Call-Backs
Inevitably, the Hulk vs Hulkbuster sequence is a big deal and it takes up a significant chunk of time, as any clash of the titans would.
And during the battle there are two call-backs to the first Avengers film. The first sees Stark unceremoniously pummelling Hulk's head into the ground with a one massive hydraulic fist, calling back to the "puny God" moment with Loki.
The second comes at the resolution of the fight when Iron Man delivers a knock-out punch to the distracted Hulk that is almost a shot-for-shot mirror of how the Hulk punches Thor in the first movie.