Michael Bay and his Transformers 3 crew is currently filming in Chicago and some of the cool folks in the city grabbed some video of Optimus Prime in action, along with a really cool video of (what I assume is supposed to be soldiers) sky diving between the buildings in the middle of the city, check them all out below!

Transformers 3 stars Shia LaBeouf, Josh Duhamel, Tyrese Gibson, Rosie Huntington-Whiteley, Frances McDormand, John Malkovich, Kevin Dunn, Julie White, Ken Jeong, Patrick Dempsey and Alan Tudyk.

Transformers 3 Chicago Filming – Optimus Prime Explosion

Transformers 3 – Optimus Prime avoiding an explosion

Optimus Prime Transformers 3 Chicago

Transformers 3 Chicago shoot (squirrel suit jump)

Transformers 3 is slated to hit theaters on July 1st, 2011.

[Source] BleedingCool