A driver for Cavalier Couriers, Inc. leaves her delivery truck running and in neutral without setting the parking brake while she exits the truck to make a delivery. Her truck rolls down a hill and crashes into a nearby gas station pump, causing a small fire and gasoline to leak from the pump and flow down the street. As the fire ignites the gasoline, flames spread to a construction site a block away. The flames burns a platform supporting a large crane, and the crane falls over onto and hits a pedestrian, Lucky Larry, walking on the sidewalk just outside the construction site. Lucky Larry is severely injured and sues Cavalier Couriers, Inc. under a negligence theory to recover for his injuries. What elements does Lucky Larry need to prove to win his case