"Doctor, are you sure I''m suffering from pneumonia? I''ve heard once about a doctor treating someone with pneumonia and finally he died of typhus."
"Don''t worry, it won''t happen to you. If I treat someone with pneumonia he will die of pneumonia only." . . . ;->
Boss: (to employee) - Experts say humor on the job relieves tension in this time of down-sizing, Knock, Knock.
Employee: Who''s there?
Boss: Not you anymore.