Hey,
I just thought I'd Give my idea out its not great and it isnt tons of gold but hey it will get you some money. Basically its doing the Flying your mount but upside down and making it do flips. The best place to do this is by the Battleground/Arena area. Most people still don't know how to do this on my server so i just do it and all the newbs love it. When they ask you how to do it tell them you would let them know for 10g if they say no then say fine 5g. Anways its a good way to pick up some money if you low becuase u just bought your mount and you need repairs. I made about 100g in 30 mins doing this but again this can't be done repeadetly. I hope this helps some people. Just thought I'd throw an Idea out there.
If this has already been posted I take no credit and Im sorry for the repost.
BTW: to do the backflip just hold down Insert and used your directional buttons. Have a friend look at you so you can get good at it. I take no credit for figuring the trick out I am merely trying to help people pick up some loose change.