Able Entered a Small Restaurant and Sat on a Stool

True/False

Able entered a small restaurant and sat on a stool at the lunch counter.Baker entered the restaurant a few moments later,and sat down at the lunch counter next to Able.For no apparent reason,Able suddenly struck Baker on the side of the head with his fist,knocking Baker to the floor.Baker raised himself from the floor,then seized Able,and tossed him through the large glass window at the front of the restaurant.Able was seriously injured,and hospitalized as a result of the incident.
-Baker would not be liable for the injury to Able,because he had acted in self-defence.