Mesmerizing Fruit Hat
The https://www.wowhead.com/item=110505/mesmerizing-fruit-hat is a collectible item that makes you dance even while mounted! The cooldown and buff duration for this item is 1 hour.
An amusing use of this item can be witnessed if used in your Garrison. Guards and other NPCs around you will start dancing and proceed to form a conga line behind you, following you through your Garrison's premises. Although, if you stand idle for too long, they will start to disperse and go back to their usual business.
During the Warlords of Draenor Beta, the http://www.wowhead.com/item=110505/ was purchasable from http://www.wowhead.com/npc=80285. As of live, the item was removed from the vendor and remained hidden for a while, making people think that it was removed from the game.
Later on, it was discovered that the item was lootable from the http://www.wowhead.com/object=226956 in Pandaria's Valley of the Four Winds, located underneath a bridge in The Imperial Granary.
/way Valley of the Four Winds 52, 63.8
Bear in mind that deleting this item from your inventory won't let you loot it again on that character. Another notable thing to mention is that you shouldn't use this item in front of a boss. Just like everyone, they love to be part of the conga line as well.