what a school~

Im a prefect.Im not too fierce and not too gentle.Im very happy to be a prefect.But one day,im look after the gate at school.One standard six students break my hand.How to break?because im holding one railing at my left,one at my right and im standing middle it.The student bang left side,fortunately i dint drop down the stair case!after three week,the students bang again.I use my ultramans shield for defend it.im very pain,but at last i defended the students with my metal hand