Blocking the other guy

So if the attacking drivers are allowed to change their lines more than once (as the preceding section explains), why don’t these aggressors simply pass him on the other side, knowing that their prey can’t change his line again? Because if the blocker has timed it right, he will have forced the attacker to lift off the throttle just as the front of his car is almost upon the rear of the defending car. This will have lost the attacker the advantage of momentum he had.
It’s therefore essential for the blocking driver not to make his move too early; otherwise the attacker can simply keep his right foot nailed to the floor and steer around the other side, shouting “Eat my dust!” as he flies by!