Leo's Fortune

Same concept as Bonus Level A here, except the course has more twists and turns. It is much shorter though. You should be pretty used to how to puff and sink at the right times to keep your speed up, but the real key to this achievement is that last section at the end of the lap. The guy makes note of it in the video too. Your first lap will be slower than the rest, but at the end of every lap you absolutely need to sink at the right times to build up a ton of speed for the first half of the next lap. The video below shows how it's done. Full credit to its creator.