A joke told among mathematicians demonstrates the nature of the fallacy. When flying on an aircraft, a man decides to always bring a bomb with him. "The chances of an aircraft having a bomb on it are very small," he reasons, "and certainly the chances of having two are almost none!"
A similar example is in the book The World According to Garp when the hero Garp decides to buy a house a moment after a small plane crashes into it, reasoning that the chances of another plane hitting the house have just dropped to zero.
BlackAdder series on BBC:
Baldrick's Bullet.m4v (http://www.youtube.com/watch?v=pKRxX3s3JlM#ws)
Brilliant............ :pirate: