I got one...
City slicker is driving down a country road, soaking in the country experience when he notices a farmer in a pasture.  The farmer is standing over a cow, which is laying on it's side, just off the road.  As he gets closer, the farmer waves him over, so he stops.  As he is climbing over the rail fence, the farmer says, "Mornin' Mister!  I'm shore gald you happened by.  Would you mind giving me a hand with this cow?"  Slick looks closer, and notices that there are two calf sized back legs sticking out of the back end of the cow.  "Whoa, sure I'll help, what can I do?" he said. " Just grab hold of one of the legs, put your boot on the cows back side and PULL!"  Together, the city slicker and the farmer pull and pull and manage to safely deliver the healthy calf.  Standing in exhaused silence, they catch their breath and watch the calf take it's first shaky steps.  Finally the farmer offers the slicker his hand and says, "I shore appreciate your help. I don't think I could have done that alone! If I can ever do anything for you, you just let me know, hear?!"  Slick looks back at the calf and says, "Just answer one question.  How fast was that little cow going when it hit that big cow?"