This is a funny video about a glass slide in LA that allows you to look down through it 1000 feet to the street. Scary. It reminds me of the Sky Tower in Auckland, New Zealand (tallest man-made structure in southern hemisphere) I visited, that had a 1.5 inch glass floor at the top you could look through and see the ground almost 1100 feet below. Nerve-wracking to walk on, even though it was guaranteed not to break.

Although these experiences take no skill or athleticism, it’s a real confront to anyone, even if you are not generally afraid of height.