The English Patient - Oldy but a goody!
An old chap was very ill and his son went to visit him in the hospital. Suddenly, the father began to breathe heavily and grabbed the pen and pad by the bed. With his last ounce of strength he wrote a note, dropped it, and died. The son was so overcome with grief that he didn't remember slipping the note into his pocket. At the funeral, he reached into the pocket of his coat and immediately felt the note. He excitedly read it thinking it might be something he could recite during the service.
It said: YOU FOOL -- GET OFF MY OXYGEN PIPE!!!