It was very likely inappropriate (and possibly illegal; see below), but unless the woman was injured or suffered some significant loss or cost, there would effectively be no civil legal claim (e.g. a lawsuit) against the store or the guard. That's because a person can only recover compensataion for actual injuries or costs she suffered, and the amount of compensation is related to the extent of injuries or costs.The woman may be able to press charges (e.g. for assault) against the guard: a store guard has no right to strike, throw, etc. someone except to in self-defense or to defend another person; if she is interested in doing this, she could contact the police.