 Shortly after 11 p.m., a roof truss collapsed, causing other beams to fall, one falling on the worker, pinning him under a steel beam.The worker was airlifted from Credit Valley Hospital, by Ornge air ambulance to a nearby trauma centre in Toronto.Erin Mills Town Centre has been used as a filming location for several films, including Noam Chomsky's "" (1992), "Hedwig and the Angry Inch" (2001), and "Confessions of a Teenage Drama Queen" (2004) starring Lindsay Lohan.