In the States we would call that a speed trap.
Oh... then it's probably something to do with the mass amounts of body armour and your ref constantly stopping the game.Talk all the smack you want about American football players. Let me see any other 300 pounder in any other sport in any other country run a 4.4 40. They're more athletic than you think. They might not be able to run a marathon, but they're quick.