They are called Murphy's Laws for a reason. You'll get caught if you ever forget. And if you don't forget, you'll get caught anyway.

1. If anything can go wrong, it will.
2. 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.
3. If anything just cannot go wrong, it will anyway.
4. 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.
5. Left to themselves, things tend to go from bad to worse.
6. If everything seems to be going well, you have obviously overlooked something.
7. Nature always sides with the hidden flaw.
8. Mother nature is a bitch.