My Dog was using the restroom and a man walking up, dog barked at the man and the man fell, he called the ambulance and said his back hurt, no police.

Sure you can be sued - all it takes is a filing fee to sue someone. The question is whether you face a risk for being held liable for a claim for compensation by the man who fell. In California, the "strict liability" for injury caused by a dog applies only when the dog has bitten someone. You will need to determine - alone or with an attorney - whether strict liability applies to this case. If strict liability does not apply, then the plaintiff must be able to establish that you knew your dog had a dangerous propensity, and that you failed to protect other people from that dangerous propensity, and that the plaintiff was injured because of that dangerous propensity. I don't know how a court would rule about a dog's barking: my guess is that it would not be a dangerous propensity.  It seems to me that a claim for personal injury as a result of a startle response because of a dog bark is a long shot. Not impossible, just tough to find that a dog owner must protect people from a bark.    Brian Chase,  BISNAR|CHASE, Personal Injury Attorneys.  http://www.BestAttorney.com http://www.ProductDefectNews.com  800-956-0123