The medical student was shocked when he received a failing grade in radiology. Approaching the professor, he demanded to know the reason for the grade.”You know the self X-ray you took?” asked the professor.”I do.” said the student.”A fine picture,” the professor said, “of your lungs, stomach, and liver.””If it’s a fine picture, then why did you give me an F?” asked the student”I had no choice,” said the professor.”You didn’t put your heart in it.”