Ryan Reynolds, the film's star, paid an emotional tribute to driver, saying the crew were "heartbroken, shocked and devastated" by the tragedy.

An eye witness gave a graphic description of the accident.

"She lost control really quickly, it happened in a split second. She was going full throttle, and then there was a building there," Nathan Kramchynski, who works on the seventh floor of a nearby office building told CBC News.

"She went from zero to really quick. She just disappeared from view," he added.