How does an assassin's stalk work? Does the assassin have to be in the same MUD room to be getting the benefit for assassinate or martial trance, or just on the rack? Also, can assassin follow someone around if stalking if the nofol toggle is on? And if so, does an assassin 'lose' the stalk if the victim does something like run over an ocean, and if not what determines when the benefit is given up?

This is a high level ability that I can't ask about on newbie channel but that suddenly become relevant :)