A byte walks into a bar looking miserable.
The bartender asks it: "What's wrong buddy?"
"Parity error." it replies.
"Ah that makes sense, I thought you looked a bit off."
A man is smoking a cigarette and blowing smoke rings into the air. His girlfriend becomes irritated with the smoke and says "Can't you see the warning on the cigarette pack? Smoking is hazardous to your health!" to which the man replies, "I am a programmer. We don't worry about warnings; we only worry about errors."
The six stages of debugging:
1. That can't happen.
2. That doesn't happen on my machine.
3. That shouldn't happen.
4. Why does that happen?
5. Oh, I see.
6. How did that ever work?