Its a bit harder to recreate since it requires a bit of bad luck and nitro boosts on your belt.
- Go to the Halls of the Eclipse in Suramar in the Felsouls Hold area. There you have to take the first steps down to position 27, 88
- Use your nitro boost belt and hope that it fails and launches you into the air. Repeat this step until it fails.
- Use goblin glider or whatever you like