A man breaks down in his car and pops open the bonnet to have a look. "Needs a new alternator!" says a voice from behind him, he turns around and is astonished to see a cow standing there!
He runs to find the farmer and says "Wow! I've broken down and your cow has told me whats wrong with it! What an amazing cow!"
Farmer says "Pah! That pesky cow! I'll shoot it in the morning!"
Man says "But why?? That cow is amazing!"
Farmer says "Rubbish! It don't know nothing about cars!"
(The old jokes are the best ones eh?
no?)