Airport Fight! How Can YOU BEST DEFEND?

A young black woman gets to throwing hands at two men--one white, one black--in what appears to be an airport coffee shop. At one point she attempts to strike the men with a large metal chair, and ultimately she hurls herself over the counter before finally stomping away. The men defend themselves against these attacks, at one point vigorously throwing the woman to the floor. Was the woman's attack merely non-deadly force, or did it escalate to deadly force--and, if so, did it do so lawful...