It means the rider has to ride the machine under him accordingly but as fast as is humanly possible for those lovely moments in time .. which is the whole and total point of getting you and your machine onto Glencrutchery Rd, one lap is totally different to the next, a few inches off line, somebody to pass, a heavier bike after a pit stop, she won't quite pull top for some reason, she doesn't feel the same as yesterday .. all those things and more. My advice is - see if you can get hold of some parc ferme/pit pass's and have a look at the faces and body language of the guys with their bikes, see if they look bothered about how much time they will spend at full throttle.