I was flipping between CSI and a show on the History Channel, "Black Las Vegas", sort of surreal that I was watching two shows related to Vegas.
Anyhow, "Black Las Vegas" was talking about how Vegas was redlined, Blacks and other undesirables were on the west side of the railroad tracks and everyone else on the east. During that segment a train was rolling by and I was thinking, "that is some really good sound they have for that train and boy is the stereo system doing a great job".
Then I realized it was a train passing by, I live about 150m from a rail line that is rather active with freight. Just kind of cool about the timing of the train going by and the scene on the tv.