PCW: And then the brain morphs into a bird's-eye view of Manhattan?

Carras: Yeah, the last part is the entire greater Manhattan area from overhead, and then we go in through the rooftop of a building, and that turns into the sky. Pretty crazy sequence.

They also had a single Red camera in the back seat of a cab driving around New York as well, which came in handy.

PCW: For the parts of the sequence that went through the front of the cab and out the back window?

Carras: Yup. I'm still not exactly sure how that came about. Before we'd even started putting anything as a visual effect, we were just combing through the footage and stringing together a rough animatic of the structure of the sequence, sort of what the bones are. And Daniel Durand, our in-house visual effects editor, pulled all these shots from inside the cab and we said to ourselves "wouldn't it be cool if we traveled through all these cabs."