Transformers: Age Of Extinction -

: While much of the climax is set in Hong Kong , the production used creative "California doubling," filming many Hong Kong-based scenes in Detroit and Chicago before moving on-location to China. Technical Milestones :

: This film marked the first live-action appearance of the Dinobots , including their leader Grimlock , a fire-breathing mechanical Tyrannosaurus Rex. Transformers: Age Of Extinction

: Mark Wahlberg reportedly performed 90% of his own stunts . : While much of the climax is set