The farmer's mule had just balked in the road when the country doctor came by. The farmer asked the physician if he could give him something to start the mule. The doctor said he could, and, reaching down into his medicine case, gave the animal some powders. The mule switched his tail, tossed his head and started on a mad gallop down the road. The farmer looked first at the flying animal and then at the doctor.
"How much did that medicine cost, Doc?" he asked.
"Oh, about fifteen cents," said the physician.
"Well, give me a quarter's worth, quick!" And he swallowed it. "I've got to catch that mule."