On January 7, 1981, four carpenters – Donald Davis, Gunther Couvreux, Brian Stevenson and Yrjo Mitrunen – were killed while constructing Bentall Four. They were preparing a platform known as a 'fly form' (see formwork) for the last concrete pour on the roof, when it broke free. Without warning the fly form; known as 'fly form E', fell over the edge and carried the four men to their deaths. The news of this horrific accident shocked people across Canada and around the world.