One of the craziest things I've seen in NYC is the line for the Empire State Building observation deck in July when I took some people visiting there.
The wait was like 6 hours. Imagine if you didn't make much money and saved up your whole life for a 5 day NYC vacation and half of one of your days was standing in line for 6 hours in the lobby of a building.
i probably won't go atop the Empire or the Statue of Liberty.
the 30 Rock however if it has an observation deck I'll go up there