I blogged very recently about a fear of heights. The tallest building in the US – the Sears Tower in Chicago – has just installed a Skydeck which consists of solid glass boxes that extend outward from its 103rd floor. You can walk out onto them and look down through solid glass to ground level 1,353 feet below.
One word: terrifying.
And no, I could not step out onto them. The thought of being 103 floors above the ground with nothing more than glass beneath my feet is too much.