From Guild Wars 2 Wiki
Hint: Perform a Flip-Spin-Flip using the Sipedon Deeps diving goggles in Timberline Falls.
— In-game description
- Use the Diving Goggles near the Sipedon Deeps found in the Nonmoa Lake area of Timberline Falls.
- To perform the trick, use the skills in the following order: 2 - 1 - 2.