A man limped into a hospital to have his foot X-rayed, and was asked to wait for the results.

Some time later an orderly appeared and handed the man a large pill.  

Just then a mother with a small child in need of immediate attention entered.  
After the orderly disappeared with the new patient, the man hobbled over to get a glass of water,
swallow the pill, and sat down to wait.  

Some time later the orderly reappeared carrying a bucket of water.  

"Okay," he said, "Let's drop the pill in this bucket and soak your foot for a while..."