Avengers: Age Of Ultron - 15 Obscure Easter Eggs You Probably Missed

One definitely for the most ardent of Hulk fans, this nod has been debated, but it's always crucial to remember that no brush strokes in any MCU movie is accidental. That there is always a decision behind each detail.

When Stark calls in VERONICA (a tongue-in-cheek reference to the system being the opposite of Betty for Banner), he and the Hulk clash in one of the most eye-catching sequences of the entire film. They inevitably destroy buildings and terrorise locals but in the squall of violence, there's a fleeting reference to an important member of Hulk's universe.

Between heavy hits, there's a quick glimpse of a truck with a corporate logo reading "Crawford" emblazoned on the side. For the more well-versed Hulk fans, that could be a reference to Dr Geoffrey Crawford, Banner's dying mentor attempted to use his genetics to cure himself of a deadly disease.

Having turned into the super-intelligent Gamma Ray-enhanced Ravage, Crawford fought off both Hulk and a Hulkbuster unit on a rampage, making his spiritual presence in this scene all the more pertinent.