Why were shoes thrown at Bush?

Why were shoes thrown at Bush?
(inspired by the famous joke-riddle: why did the chicken cross the road?)

Plato: For the greater good.
Aristotle: To actualize their potential.
Epicurus: For the fun of it.
Zeno of Elea: To prove they could never reach Bush.
Karl Marx: It was a historical inevitability.
Timothy Leary: Because that's the only kind of expression the Establishment would allow them.
The Sphinx: You tell me.
Pyrrho the Skeptic: What shoes?
Nietzsche: Because if you gaze too long at the shoes, the shoes gaze also across you.
Jean-Paul Sartre: In order to act in good faith and be true to themselves, the shoes found it necessary to hurl themselves at him.
Ludwig Wittgenstein: The possibility of "throwing" was encoded into the objects "shoes" and "Bush", and circumstances came into being which caused the actualization of this potential occurrence.
Conspiracy Theory: It was Bush who threw himself on the shoes.
Albert Einstein: Whether the shoes were thrown at Bush or Bush threw himself on them depends upon your frame of reference.
Kafka: Hardly the most urgent enquiry to make of a low-grade insurance clerk who woke up that morning as a shoe.
Ralph Waldo Emerson: They were not thrown at Bush, they transcended to him.
Voltaire: I may not agree with the act, but I will defend to the death their right to be thrown at Bush.
Thomas Paine: Out of common sense.
Mark Twain: The news of their throwing has been greatly exaggerated.
John Milton: To justify the ways of God to men.
Mr. T: If you were holding those shoes, you'd have thrown at him too!
Wordsworth: To wander lonely as a cloud.
The Godfather: I didn't want his mother to see it like that.
Othello: Jealousy.
Hamlet: That is not the question.
Dr Johnson: Sir, had you known the reality of American occupation for as long as I have, you would not so readily enquire, but feel rather the need to resist such a public display of your own lamentable and incorrigible ignorance.
Oliver North: National Security was at stake.
Donne: They didth for thee.
Jack Nicholson: 'Cause Bush (censored) deserved it. That's the (censored) reason.
Malcolm X: Because they had to be thrown at him by any means necessary.
John Lennon: Imagine all the shoes of the world thrown at Bush. Imagine a world without American neo-imperialism.
Barack Obama: The shoes were thrown at him because it was time for a CHANGE! Yes, We Can!
Hillary Clinton: Those were supposed to be my shoes.
Al Gore: I invented the shoes!