Become huge for five minutes. During halloween and horde only.

[Jehebi]

Note: This works best to show off if you have an epic mount with as much +mount speed as possible.

Get some Hallow's End Pumpkin Treat (vendor near the inn) in Orgrimmar

Go to Sen'jin village in Durotar (bottom right).

Get the Zalazane quest.

Go south of Sen'jin village to Echo Isles and finish the quest.

Hand it in.

Eat Hallow's End Pumpkin Treat until you get the larger and oranger buff.

After handing it in talk to Bom'bay (/target Bom'bay).

Select any of the options and keep going until he gives you a 'Grow' debuff. This debuff lasts for five minutes. You should now be really really big. Mount up and run back to Orgrimmar. To really see how big you are, stand next to another player. Be a tauren for the best effect.

Note: Sorry if this is a repost.

[sorvad]

cool... if it works i will ´+Rep you mate...

[ralfh]

If you get "Grow" buff and logout, login again you can get 2x growth buffs and the Hallow's end buff.

[s0up0re]

It sucks the hallow's end treat doesn't stack with winterfall firewater, I dunno about growth potion though. But I prefer 2x Grow, Winterfall Firewater, Growth Potion, Bloodlust, Raptor Mount, and a Pirate Costume. (Goblin)

[XinuX]

This is really fun to do. I usually just take 2xgrowth and firewater, riding around in org with my racing ram like 3xsize of a tauren, im ud.

[Chrism99999]

lawl. You would be like big enough to run up buildings XD