I am often frustrated during the last 5 minutes of a match when, instead of exciting rugby, we have a turgid slow down as the team that is leading goes into "slow mode" in terms of setting scrums and lineouts. I watched a game recently where a scrum was awarded with 3 minutes to go. However, it took two and half minutes to set and then reset the scrum and, what should have been a grandstand finish, was a damp squib! I would propose that a hooter goes when there 5 minutes of play left. After this point, the referee will stop the clock when he rules a scrum, a lineout, or a penalty. He will then restart the clock when the the scrum or lineout is set - or when the kicker is ready to take a kick. I believe that this would provide fans with the potential of more exciting finishes to games and stop the game fizzling out in the last 3 or 4 minutes.