The Transformers 4 news is really starting to pour in this month. A reader of On Location Vacations spotted Michael Bay (and even got a photo with him) in Chicago yesterday scouting some possible filming locations for TF4. According to the reader, Bay and his crew were walking south on LaSalle St. and were headed toward the Board of Trade Building. If you're in Chicago, look around, because you might've walked by Michael Bay! See more photos here.