An Indian brave rode into town one early evening, kicking up a hail of dust behind him. Very quickly he jumped from his horse and rushed into the doctor's office.
"Doc! Doc! Big chief no shit!" he shouted excitedly. The doctor calmed him down and handed him two tablets for his chief to take before bedtime.
"I assure you he will be all right first thing tomorrow morning, " he said.
The next evening, the same brave rode into town again with the same complaint, "Doc! Doc! Big Chief no shit!". This time the doctor gave him four tablets for his chief to take before bedtime.
And again, the same thing happened the following evening. The brave rushed into the doctor's office and yelled, "Big Chief no shit!". This time, in exasperation, the doctor pushed the whole bottle of tablets to the brave.
Yet again, the following evening saw the same brave rushing into the doctor's office. "What now?" the doctor enquired. "Big shit, no Chief," the brave screamed.