Taken from another forum. Fortunately I olst weight not height!) :
Boris Johnson went to his doctor's office to have a physical exam done. The nurse asked, "How tall are you?"
"I'm about six foot two," said Mr. Johnson. The nurse measured him and found that he was only five foot six.
"How much do you weigh?" asked the nurse.
"Around 150 pounds." The nurse weighed him and found that he weighed 200 pounds.
Then she took his blood pressure. "Your blood pressure is incredibly high," she said.
"What do you expect?" sputtered Mr. Johnson. "Before I came here I was tall and thin. Now I'm short and fat!"