Sometimes you get so annoyed you just have to laugh, and Philly drivers know this feeling so well. Driving in major cities is a special kind of nerve wracking. Most of us learn to drive by navigating back roads and highways. People tend to obey the laws here, and if you pick a remote enough area, you can have plenty of space to practice. In a city, though, it's like the rules just don't apply half the time. It's all about what you can get away with. Just tell that to the person whose car is roc…