Years ago when the first 416 rubber tired backhoe came out the dealer I worked for had a field, open house for customers and the Cat factory sent in a factory demonstrator to show off the new backhoe but he didn,t put on near as must of a show as the one you pictured. He could walk the machine without it,s tires on the ground and a few other tricks but this one you showed here is a real talented operator.
I have seen photos like this before,you gotta admire the operator for his skills never mind bravery. Tho I reckon the heavy mob aka health and safety types would heartily disapprove of this sort of behavior!!!!
Look at this..
http://www.youtube.com/watch?v=Q4toJA5EXcM&NR=1