Hey, Ive not posted anything on here yet and I accidentally came accross this so thought id put something up. Its kind of useless really but some people might have some fun with it.
After using the item that turns you into a troll from the new Echoe Isles quest, I turned it off in the buffs bar by right clicking it while I was on my mount. I then noticed that I was much larger than I normally was. Im not sure if it works with every race/class but I am an Orc DeathKnight and I was using the Tiger mount from ZG. I havent had time to do the quest on another race to give it a try but i'm sure someone can give some insight as to whether it does.
To do it you simply:
1. use the item that turns you a darkspear troll.
2. mount up
3. right click the darkspear troll changing buff or allow it to run out
and you should be rather large on your mount compared to normal .
Hopefully someone can have osme fun with it.