I used to be totally fearless, but as I have gotten older, I have adopted fears of all kinds. I am not sure why this is, maybe it is a greater grasp on mortality or something deep like that. But I went through a bout with a serious fear of flying. I somehow grew out of this, but I haven't been able to shake my fear of heights. When I saw this commercial on TV, my stomach did flips. I knew this was the ultimate low point, and I am officially a wimp.