[bucky]

Did he look at you to see if you were ready? That might have been a time to remind him to be on other side. Another idea would have been to blow your whistle and "act" as if something was on the floor near the circle. Pretend to pick it up and quietly remind him. Could act as if there was moisture on the floor and rubbed an area with your shoes. Could have blown your whistle, walked to center circle, and acted as if you were curious about bench horn and reminded then. Could have done many things like that if it really bothered you. Otherwise, indeed, maybe just let it go and discuss later.