Murphy's Original Law:

If there are two or more ways to do something, and one of those ways can result in a catastrophe, then someone will do it.

Murphy's Law or Finagle's Law of Dynamic Negatives:

Anything that can go wrong will go wrong.

Murphy's Corollaries:

1. Left to themselves, things tend to go from bad to worse.
2. It is impossible to make anything foolproof because fools are so ingenious.

Quantized Revision of Murphy's Law:

Everything goes wrong all at once.

Murphy's Constant:

Matter will be damaged in direct proportion to its value.
b

Smile... tomorrow will be worse.

Conclusions:

1. If there is a possibility of several things going wrong, the one that will cause the most damage will be the first one to go wrong.
   Corollary: If there is a worse time for something to go wrong, it will happen then.
2. If you perceive that there are four possible ways in which something can go wrong, and circumvent these, then a fifth way, unprepared for, will promptly develop.
3. Anything that can't go wrong will anyway.
4. If several things that could have gone wrong have not gone wrong, it would have been ultimately beneficial for them to have gone wrong.
5. Nothing is as easy as it looks.
6. If everything seems to be going well, you have obviously overlooked something.
7. Everything takes longer than you think.
8. Every solution breeds new problems.
9. Nature always sides with the hidden flaw.
10. Mother nature is a bitch.

Commentary:

Murphy was an optimist.

Addendum to Murphy's Law:

You never run out of things that can go wrong.

Law of the Perversity of Nature or Mrs. Murphy's Corollary:

You cannot successfully determine beforehand which side of the bread to butter.

Corollaries:

1. The bread will always fall with the buttered side down.
2. Otherwise, the butter was on the wrong side.
3. The chance of the bread falling with the buttered side down is directly proportional to the cost of the carpet.

"Proof of Murphy's Law: Murphy's Law cannot be proven, yet is correct, as
when you try to prove Murphy's Law, you will see that the proof is
incorrect. This is obviously due to Murphy's Law, therefore Murphy's Law is
correct and proven."

got this from a website and well it's up to you to believe in it ( murphy's law ) or not, but I sure as hell do.