An elderly lady went to see her physician about a problem she was having.

After an examination, the doctor told her that she needed a sigmoidoscope to check her lower intestine.

He began the examination, telling her to let him know if she felt pain.

Well the doctor's efforts brought forth a tremendous amount of gas on her stomach that she expelled with a very loud fart.

"Madam!" the doctor exclaimed, "A simple 'yes' or 'no' will suffice."