The injured woman is suing the florist shop for negligence. What would be the result?

Bart drives a delivery van for a local florist. One afternoon, after his last delivery but before returning the van to the florist shop to pick up his personal vehicle, Bart stopped at Walmart to make a layaway payment on toys he is buying his children for Christmas. Because he expected to be away from the van only a few minutes, he left the van running, but did set the emergency brake. While Bart was in the store, the brake slipped, and the van rolled across the parking lot, pinning a woman between her car and the van, resulting in severe injuries. The injured woman is suing the florist shop for negligence. What would be the result?