Went to a local golf shop to try out some new drivers. You hit into a golf simulator that shows club head speed, distance, ball spin, etc. While hitting away a customer came up and started giving me unwanted advice on grip, take away, hip rotation, etc. Not being rude I let the guy just talk but he really ruined the day for me. What do you say to person who gives unwanted advice when just trying new clubs or swing changes and you don't want to come off rude ?