Hey just thought I'd mention this glitch I found with an item which turns you into a naga for 20 seconds called the Bones of Transformation.
Bones of Transformation - Item - World of Warcraft
You can get this item from Night Elf archaeology probably over 450+ skill required to get it but I'am not to sure.
To do this glitch all you need to do is hold backwards on your keys until the buff fades or you cancel it and now it looks like your moonwalking!
I've also tried this with the Wisp Amulet but it doesn't seem to work with it. Wisp Amulet - Spell - World of Warcraft
Also remember if you let go of the key it will stop working and other people can see you doing this as well so have fun with it!