Here is the Survivors Bag of Coins : Survivor's Bag of Coins - Item - World of Warcraft
The item itself is interesting and does exactly as it says "Throw one of the coins to the ground, propelling yourself in the opposite direction.". The propulsion is about 50-100 yards in a high arc. This could have great exploration potential.
It currently does not work in Pandaria, inside or in combat. I do not know if it works in BGs.
To obtain said item follow these steps:
1) Be a rogue
2) Have both Glyphs of Detection and Glyph of Disguise
3) Head to Ravenholdt in Hillsbrad Foothills (70.6, 47.8 )
4) Find Reislek's Ghost on a hill just a little way south of the manor (70.5, 50.6)
5) Pickpocket him with the Glyph of Disguise - this will make you look like him.
6) Head inside Ravenholdt Manor and go down stairs
7) Use Detection (Given by Glyph of Detection)
8 ) A ghost will appear underneath the stairs named Orsur
9) Talk to him and he will give you said item
To use the item you need to have the item in your bags, and you need to pickpocket NPC's to gain buff stacks in order to use it.
When using it, if you want to shoot forwards throw a coin behind you. If you want to shoot backwards, throw the coin in front of you
Credits to Who is Orsur? : wow for this discovery
EDIT: Somehow I called it a bag of Secrets, oh well, close enough