If you were free and running around and you KNEW your mother/father were going to make you go inside and take a bath and go to bed, would't YOU run away!!!
When Duncan runs too far ahead of me, I simply turn around and start going the other direction. I will say "this way" a few times to him. It is literally a matter of a few seconds, at the most 30 seconds before he comes barreling up to me or past me!! Works like a charm!!
Sometimes, I hide behind a tree and he comes searching for me! I feel kind of bad doing that however because I feel like he gets scared that he lost me....