Guys a piece of shit for sure but if you are in a self defense scenario please do not react the same way this lady did, it will be hard for the courts to see her as a victim after she grabs a weapon to confront the aggressor as he is trying to leave. If you do want to fuck someone up for slighting you/splashing beer in your face, consider learning some sort of self defense/martial art. Untrained men vastly overestimate how well they would perform in a fight and a smaller, weaker person would be able to overcome them with a few years practice