Dog On A Chain....
 

........ but not anywhere close to what you are thinking.

How on earth did it learn this???

<object width="450" height="370"><param name="movie" value="http://www.liveleak.com/e/622_1326739501"></param><param name="wmode" value="transparent"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.liveleak.com/e/622_1326739501" type="application/x-shockwave-flash" wmode="transparent" allowscriptaccess="always" width="450" height="370"></embed></object>

good effort, never seen that been done before!

if you were a dog n caught your nuts trying to jump a chain link fence, you would learn to ballance on one prety damned quick !!!
lol