This was posted in our guild chat in game so I figured I would post it here.
Requirements:
Level +20 Character
Mount
Mount Buff
Step 1.) Mount Up
Step 2.) Jump
Step 3.) When you are at the highest point in your jump, Press your Mount Buff key
When you land your character will be invisible,
Attack mobs with out your character being seen but be warned, you can still be attacked if they auto target you due to damage or if they cycle through using the Tab key.