Die next to the goal, then use moon jump and turbo into the goal. You'll hit the goal before the level restarts, and the score will tally up as you restart the level. Use the pause menu and keep restarting, which also restarts the timer on the score sheet to 0. If you keep restarting, you'll finish with 0:00.02. This can also be done in White Jungle and other stages. Without that trick, I got 0:14.30 in Green Hill. Also, 0:48.47 PC1.