Right, was going to HH with my GF and she had used a ninja wand on me.
For some reason I didn't want to be a ninja any more and I clicked it off while my GF was in my hog.
then the laughing started :
(Good thing this is Server Side, not Client side!)
Have a wand on you in which you can mount (Ghost, Gnome Pirate, Leper gnome, Ninja etc.) and get your passenger in.
Click off your buff and Profit !
Enjoy !