that is when you learn to be good at your job ,and if you learn your dog at a early age to work the lamp loose and always be a good distance in front of you instead of being by your side ,then it is half way to the game before it has to start running .,we all do it different ,that is a way i picked up on 20 odd yeas ago and has made life a lot easier than keep on sliping ,and waiting for the dog to come back to you ,so you can put the slip back on ,plus you dont have to keep on calling it back .or waiting for it to get over a fence ,that is what brain can help achieve .rather than speed .