Why does this always happen to me?

[raceman]

Why is it that when you decide to change the front discs and pads you've been meaning to, but isn't urgent, and have just paid the money, the alternator sies a death on the way home with your shiney discs still in the boot!

[HYFR]

its not just you mate, they invented a whole Law against it....Sod's Law, but somehow its still getting broken