An entertainment blog has posted video of the accident that critically injured an extra on the set of 'Transformers 3' outside of Chicago.
Radar Online posted a 90-second clip that shows a white Toyota sedan spinning out of control and careening into the median. Extra Gabriella Cedillo was driving her 2006 Toyota in a highway stunt scene when she was injured.
Scroll down for video of Cedillo's accident.
Police believe that a cable pulling one of the vehicles snapped and crashed through the window of Cedillo's car, striking her in the head. She was airlifted from Hammond, Indiana -- where the scene was being filmed -- to Loyola Medical Center in Maywood, Illinois, a suburb west of Chicago.
Her condition was listed as critical, and she is believed to be in an induced coma.
Another extra explained the situation of the filming to Radar Online:
"We weren't trained stunt people. They paid regular extras to use their own personal cars an extra $25 per day for that freeway scene," the extra continued.
"We were never informed of the risk we were putting ourselves in and when you take into consideration the amount you are being paid to be there, it's not worth it."
NBC Chicago reports that the Indiana Occupational Safety and Health Administration is investigating the accident to determine what caused it, and whether workplace safety rules were violated by the shoot.
In the meantime, all Chicago-area filming has been cancelled for "Transformers 3." The film still had a few days of shooting scheduled in the region.
Gabriella Cedillo is a 24-year-old bank teller, but her brother Adam says she's always wanted to be in movies. "This was not her first time as an extra," he told NBC.
Watch video of the accident on the "Transformers 3" set: