If anything can go wrong, it will.

If there is a possibility of several things going wrong, the one that will cause the most damage will be the one to go wrong.

Corollary: If there is a worse time for something to go wrong, it will happen then.

If anything just cannot go wrong, it will anyway.

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.

Left to themselves, things tend to go from bad to worse.

If everything seems to be going well, you have obviously overlooked something.

Nature always sides with the hidden flaw.

Mother nature is a bitch.

The Murphy Philosophy
Smile . . . tomorrow will be worse.

Quantization Revision of Murphy's Laws
Everything goes wrong all at once.

Murphy's Constant
Matter will be damaged in direct proportion to its value

Murphy's Law of Research
Enough research will tend to support your theory.

Addition to Murphy's Laws
In nature, nothing is ever right. Therefore, if everything is going right ... something is wrong.

Anything that can go wrong will go wrong.

It is impossible to make anything foolproof because fools are so ingenious.

Left to themselves, things tend to go from bad to worse.

Rule of Accuracy: When working toward the solution of a problem, it always helps if you know the answer.
Corollary: Provided, of course, that you know there is a problem.

Nothing is as easy as it looks.

Everything takes longer than you think.

If anything simply cannot go wrong, it will anyway.

Whenever you set out to do something, something else must be done first.

Every solution breeds new problems.

The legibility of a copy is inversely proportional to its importance.

Matter will be damaged in direct proportion to its value

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

The chance of the buttered side of the bread falling face down is directly proportional to the cost of the carpet.

The chance of the bread falling with the buttered side down is directly proportional to the cost of the carpet.

You will always find something in the last place you look.

No matter how long or how hard you shop for an item, after you've bought it, it will be on sale somewhere cheaper.

The other line always moves faster.

In order to get a loan, you must first prove you don't need it.

Anything you try to fix will take longer and cost you more than you thought.

If you fool around with a thing for very long you will screw it up.

If it jams - force it. If it breaks, it needed replacing anyway.

When a broken appliance is demonstrated for the repairman, it will work perfectly.

Build a system that even a fool can use, and only a fool will use it.

Everyone has a scheme for getting rich that will not work.

In any hierarchy, each individual rises to his own level of incompetence, and then remains there.

There's never time to do it right, but there's always time to do it over.

When in doubt, mumble. When in trouble, delegate.

Anything good in life is either illegal, immoral or fattening.

Murphy's golden rule: whoever has the gold makes the rules.

In case of doubt, make it sound convincing.

Never argue with a fool, people might not know the difference.

Penza's law about math's lessons:
The porter will knock at the door at the most crucial point of the lesson.

Where patience fails, force prevails.

If you want something bad enough, chances are you won't get it.

If you think you are doing the right thing, chances are it will back-fire in your face.

When waiting for traffic, chances are that when one lane clears the other is congested.

Just when you think things cannot get any worse, they will.

Remember the "Boomer-rang" effect; Whatever you do will always come back.

If you re-act to actions, you've acted on actions.

He who angers you controls you, there-fore you have no control over your anger.

Any time you put an item in a "safe place", it will never be seen again.

Your best golf shots always occur when playing alone.

The worst golf shots always occur when playing with someone you are trying to impress.

No matter how hard you try, you cannot push a string.
(getting everyone in the family to the car at the same time for example)

The fish are always biting....yesterday!

The cost of the hair do is directly related to the strength of the wind.

Great ideas are never remembered and dumb statements are never forgotten.

The clothes washer/dryer will only eat one of each pair of socks.

When you see see light at the end of the tunnel, the tunnel will cave in.
Or in another version
The light at the end of the tunnel is a train

Cole's Law:
Thinly sliced cabbage.

Whatever you want, you can't have, what you can have, you don't want.

Whatever you want to do, is Not possible, what ever is possible for you to do, you don't want to do it.

Traffic is inversely proportional to how late you are, or are going to be.

The complexity and frustration factor is inversely proportional to how much time you have left to finish, and how important it is.

Crespins law of observation:
the probability of being observed is in direct proportion to the stupidity of ones actions

If you go to bed with an itchy ass, you wake up with smelly fingers.

A knowledge of Murphy's Law is no help in any situation.

If you say something, and stake your reputation on it, you will lose your reputation.

Where patience fails, force prevails.

Waxman's Law:
Everything tastes more or less like chicken.

Skarstad's Observation
You will never find any more loose change than you have already lost.

If authority was mass, stupidity would be gravity.