If you are traveling around New York or New Jersey by train, you should be aware that there is a Penn Station in Newark as well as in New York and they are definitely NOT the same station.
Add that to how similar New York and Newark sound (especially in a New York accent) and you need to pay close attention to where you are getting off the train. Double check with the conductor before disembarking, or you might end up seeing a city you hadn't planned on. Though that might not be a bad thing, really.
