Karen, a driver for Alpha's Pizza, leaves the truck's motor running in neutral and carelessly forgets to set the parking brake while she makes a delivery. The truck moves forward and crashes into a nearby electrical pole igniting a fire that spreads quickly to a construction site a block away. A burned wall collapses onto a crane, which falls on Frank, a bystander, and injures him. Would Karen be liable for the injuries to Frank? Why or why not? What must Frank show to recover damages from Alpha's for the tort of negligence?