"Expect the unexpected..."

It is a common quote in all aspects of life. "Expect The Unexpected". Its origins are more than likely that of media, a catch phrase used whenever someone was caught 'not' expecting the unexpected. It has gone through time without any analysis of its context, like many catch phrases. However, I intend to analyze it.
To expect the unexpected, one must know all about the situation. Who or what variables are there? What kinds of things are involved, and how far can you trust their tolerances to the current predicament? What factors are available to cause such a circumstance where the unexpected would occur? These and many others are all the "expected", though the "unexpected" far outnumber them.
The trouble is how to categorize the "unexpected", as in, what kinds of things are you dealing with that could suddenly happen? Is it an explosive situation where one or more parties could get heated and antagonized? Or could it be as simple as theorizing the outcome of a board game? These are more factors that could go under the category of "expected".
Now, if you are expecting something, wouldn't the opposite reaction become "unexpected" by default? Therefore making this statement false? Not entirely, if you expect something, then you would at least know what the opposite could be, therefore facilitating you to at least remotely expect it; and subsequently, anything in-between.
Now for case examples of the "unexpected". Say if a subject were to take twice the prescribed dosage of Oxybutynin (roughly 45mg in a single day) and instead of experiencing such overdose side effects as: convulsions, irritability, and seeing wings sprout from their own forearms (i.e. hallucinations), and eventual paralysis and respiratory failure; he should lose control of his bladder that would not only be quite the hilarious turn around, but it would be categorized as "unexpected". Whereas the normal side effects are tragic, but "expected". This raises the dilemma, is the "expected" always the preferred course of action?
To answer a serious theological question such as that one would need to first understand causality, the process of that any action will have a reaction, and said reaction may trigger one or more actions. This in turn produces a multiplying effect what would seem to push the human race into an ever-expanding universe of possibilities. More possibilities mean more things that would go unexpected unless one was aware of them.
Now, back to the dilemma at hand, to "expect the unexpected". If you were to truly expect the unexpected, then would not the hither-to conclusions that were expected be cast off into the title of "unexpected"? In all common grounds, the answer would be yes, but if you were to apply it again, then the secondary unexpected conclusion would become expected again, therefore making every possibility expected.
In conclusion, the phrase "Expect the unexpected" is in itself, misleading. However, if you look closely enough into it’s meaning it covers all of its own angles and comes out logical in the end. I propose to negate any such thinking from further times the phrase "Expect Everything" should be adopted. Then again, that phrase could be seen as lame, especially in the eyes of media and viewers alike, though more thoroughly accurate and proven not to be falsified in any way. Then again, to expect everything wouldn't one also expect the "unexpected"?

Essays of a crazed man,
~Sean

p.s. If you made it to this part of my blog you must be high or something. None the less I am quite sure your IQ has dropped several points through reading it.