Back to the filming, Pixel Rally has posted more images from the Shia vs. Patrick fight sequence that is being filmed at Wabash and Wacker Drive. Below are sample images that from the set that has Sam wielding a steel rod with clear intent to use it indicating a vicious, mean fight for survival. The full gallery of images can be found here. PopSugar also has a gallery from the same scene filming.
This brings us to the weekend action at State Street and Wacker Drive that has a bus exploding and most of the male cast apparently involved in a firefight. The image to the right is an ornamental spire on a building at the location. This seems to match the debris that Shia and Patrick are fighting on. That image along with the 1st video below comes from a set report posted on Seibertron.com that provides a little first witness testimony along with pictures of Josh, Tyrese and Bay at work.
The second video shows a bus exploding into two halves as soldiers open fire on a probable Decepticon. Another video of the sounds of the firefight and images can be found at the Movie Chronicles. If you need a Transformers vehicle fix, the last two videos below), also found by the site gives you a nice close up look at The Wreckers and Optimus Prime as they leave their storage location.