well, if he is running away, do you have anywhere you can hook a leash up to? (prob want to do it outside, lol)
i usually give my dog a yummy treat that takes him awhile to eat...like a kong stuffed with peanut butter, ot whatever your dog happens to like.
That way he concentrates on the toy, and not you...cause one Oakley finishes with his treat, he likes to try to play with the brush...