Step into the new Tilt! attraction on the 94th floor of the John Hancock Center and at first nothing happens.
You are holding big metal bars. You are peering through a full-length window. But you know what is about to occur, and your insides, you are not ashamed to say, are like a crowded butterfly garden.
And then there's a sound — think noisy dentist's office, or airplane engine at the gate — and the eight-window chunk of wall you are clinging to begins to quit its right-angle orientation to the massive skyscraper around it.
You and the wall and the other fools at the other windows are pitched slowly forward, and you begin to think about your mortality and America's...
The entrance to Chicago's Navy Pier on a crisp Dec. 1, 2011.