I tried to be Superman several times. I tied a sheet around my neck as a cape and would jump from the top of our flight of stairs. Believe it or not - I jumped (and fell down all of those stairs) many times before I gave up on the fact that I wasn't going to fly.
Although - I might not have given up had my mother not ruled out me being allowed upstairs without supervision.
Although - I might not have given up had my mother not ruled out me being allowed upstairs without supervision.