Fear of heights is nothing exotic. Everyone who meets him knows that, right? It is uncomfortable to stand on the edge of a balcony on a slightly higher floor, let alone on the terrace of a skyscraper. And the problem with this fear is that you cannot explain it rationally. You can convince yourself that everything will be fine, but your knees remain soft, and your eyes like to blur. It is hard to imagine what kind of feelings you would experience if you walked on the glass bridge in Haitang, China, which is constantly breaking.