This should be your first achievement in the game and you will get it after the first few levels, even if you don't go for it. Just hang onto one of the poles and spin around in a circle, until you fill up the blue bar, now press to let go at the right moment so you fly towards the side of another pole. Press again and you will spin around the second pole without losing any speed. Finally get back to the first pole to finish the maneuver (A line will appear looking like the one in the achievement picture). This trick will be helpful in getting gold on every stage.