I think he is referring to the Jekyll & Hyde thing.  On one hand I have a heck of a sense of humor and can be quite jovial and easy going, until the forum rules get violated.  Then I turn into your worst nightmare.  Violate them over the weekend, when we are closed, and I will be a complete arse about it.
It is pretty simple really.  I give what I get.  Show the forums and people no respect and expect none to come back at you.