This trick enables you to run/fly at Mount speed be able to use items and attack people, First off you need to be a shaman and have Ghost Wolf and have Black Qiraji Resonating Crystal (It should be able to work with most mount).
Use the mount, and a just before the cast time finishs click Ghost wolf. then when your both the wolf and on the mount click the mount item in your bag you should dismount into a wolf them become your humanoid form and be running around at Mount speed.
Enjoy.
~Morsona
EDIT!: For those who are wondering this is Server Side, and you appear to be on your mount attacking things to others