Run up to the first yellow spring in the level (Just as the ground turns to pavement and grass) and jump to the right side of it. Push yourself against it, face right, and do a spin dash. Release to send Sonic/Tails/Knuckles spinning forward, while holding Right on the control pad, and hold it. You'll go through the two loops, but as you go downhill, your character will fly far right and off the screen. Keep holding Right untill the camera catches up with your character.