Don't try this at home

Tooling along from one place to another and daydreaming, I had a sudden thought. What if, for a split second, I forgot I can no longer go downstairs, and whipped into a stairwell at speed? Just a second too late, as my wheelchair tips off the top step, I realize I have seconds to live. Sometimes I scare myself. It was about like those times when, at the high edges of things, I sometimes wonder whether I might suddenly decide to find out what it would be like to go off the edge. And then I wonder if it would be more likely as my mind starts to go. Wondering is bad for your mental health! And then I thank my lucky stars that I did not become a test pilot, for all sorts of reasons. And everything is okay again.