Gena leaves her cars motor running while she enters a gas station to pick up some snacks for the drive home. The cars transmission engages and the vehicle crashes into a gas pump, starting a fire that spreads to a warehouse on the next block. The warehouse collapses, causing its billboard to fall and injure Ken, a bystander.

Explain the legal principle that applies in this case. Can Ken recover from Gena? Why or why not? Explain.