An old lady comes in for her medical check-up:
“Doctor Ribbit, you remember how you warned me that I should avoid going up and down stairs as much as I can?”
“Yes,” agrees the doctor
, “the last X-rays made that very clear Mrs. Jenkins.”
“You know, I’m not sure it was such a great idea doctor… I have to say all that climbing up and down the rainwater downpipe is becoming quite hard!”