There are certain moments in a life of watching live sport that just stick with you. In terms of rugby, the more obvious ones are usually an exhilarating try, a derby win, a memorable grand final performance and the trophy celebrations that follow, or a prop going 50 and diving home to the shock of everyone including his or her self. But in such a collision sport, the truth is that nothing quite gets the heart racing, or the crowd squealing with delight, like a brutally beautiful bell-ringing tackle.