I RECOMMEND EPIC FLYING MOUNT
its very easy to pull this trick, all you need is an epic flying mount.
it is possible to do it with a slower mount and with trinkets and or paladin buff but its a lot harder.
Go to a place where casters are and fly next to a caster, the caster will target you and will start casting a spell, halfway the spell fly away, you will take damage but the visual effect of the spell will still be visible, you can then kite the spell all over outlands.
Some spell fly faster than others, dont ask me why this is i dont know its random.
If you practice this a little you can make diffrent stuff fly behind you.
Fel cannons shoot meteors and these are pretty big, you can impress people with your flying pets
There is no limit to as how many spells you can kite, once i had about 6 meteors follow me trough shattrath, i kited them from shadowmoon valley.
If you stop flying the spells will hit you but you wont take dmg becuase you allready received the dmg.
Mobs shooting incinirate will make your mount look like a hotrod:
Enjoy