"There was certainly an emphasis on introducing Rosie Huntington-Whiteley to us through a number of clips that played up the relationship between Sam Witwicky (Shia LaBeouf) and Carly (Huntington-Whiteley). When she ends up trapped in Chicago after it's been taken over by Decepticons, Sam has to go into the city to find her, setting off what looks like one of the wildest series of scenes that Bay's ever orchestrated, and he was given unprecedented access to the city's resources to help stage his invasion. The result is a sense of urban chaos that I've never seen staged on this scale.
And "scale" seems to be a big word for this film. We saw battle sequences set on the home planet of the Transformers. We saw a crazy accident on the moon, and we saw what happens when all the robots scattered there by that accident finally wake up. We saw a jaw-dropping sequence involving soldiers jumping out of a transport over the city and using cutting-edge flight suits to glide down to the ground, racing between buildings as they do. We saw a piece of a scene involving an attack on a skyscraper where the Decepticons appear to saw an entire building in half using a giant sandworm-looking robot that burrows deep into the building while the human heroes struggle to find a way to ride it out in the upper half of the building.
… looks like things get very personal for Sam in this one, and like he's learned some new tricks that help even the odds when he has to face the Decepticons. We saw a chunk of an alley fight between Starscream and Sam in which Sam reveals that he's been given some new weaponry, including a grapping gun glove of sorts that seems fairly effective."