First up, some videos of Optimus Prime and the auto bots avoiding explosions and large piles of rubble at intersections:
Seibertron have posted 20 or so videos and a huge set of pictures from the day’s action, including close-ups of the autobots and “stunticons” (Nascar vehicles).
Image Gallery
Stunticons and Autobots
Stunticons in action
Destruction on Chicago’s streets
Wacker drive