Several crew were on stage when the top part of the structure came crashing down . Most fled unharmed , but some were trapped -- including one pinned under the structure . The collapse happened around 4 p.m. , one hour before spectators were set to begin streaming in for a concert by the alternative rock group Radiohead . The trapped man was extricated and pronounced dead at the scene . Radiohead was set to perform a sold - out concert in the Toronto park that evening .
Several crew were on stage when the top part of the structure came crashing down . Most fled unharmed , but some were trapped -- including one pinned under the structure . The trapped man was extricated and pronounced dead at the scene . Radiohead was set to perform a sold - out concert in the Toronto park that evening .