Just when you start the second chapter when you arrive in Boston, you will meet a couple who most likely own the Green Dragon. If you go upstairs, you will see the wife of the man who owns the Green Dragon sweeping the floor. If you walk up to her and stand next to her for a few seconds, she will drop the broom and will shove you out of the way. In another couple seconds, she will magically spawn another broom into her hands and continue sweeping the floor. You can do this as many times as you like, and it will continue to happen.