Just imagine the time it took for the dog to learn all that... xP
My dog is a herding dog and herds the chins back into their cages when playtime is over, not like nipping and stuff he goes under the bed and scoots them out and crawls on his belly after them into their cages, I think that's pretty useful my self.
Do have to admit though, the stuff the dog does is pretty useful.
He would be a GREAT helper for somebody like my father, who is blind in one eye due to a stroke and starting to have trouble with bending/reaching and mobility. Jack Russels are incredibly smart little dogs, so it's great to see somebody take those smarts and channel them into something useful that the dog obviously thinks is fun.