Otherwise known as calling in sick when your attempts to procrastinate further has fallend into the demand from your boss to just "give me the damn report".

Of course the clever procrastinator won't just stop at a stomach bug, migraine or putting your back out. Doctors Certificates are a great way to go, especially if you can show a high level of stress caused by your bosses unrealistic demands on your time. You see by the time you've returned from stress leave, the offending item in question will have been completed, hopefully by the boss who was feeling guilty because they asked you to do the job in the first place.