Vroom or bust: It took a sweet ride and a rising star — or two — to build a blockbuster from a half-baked idea and the ashes of multiple flops.

Turning an unknown into a superstar and revamping the rom-com rules amid many rewrites, this megahit's success still leaves insiders pretty shocked.

Crunch the numbers, then make way for a chubby T. rex and visual effects bad boys. This box office heavyweight disrupted the way movies are made.