You walk every day. On a sidewalk usually. In a city. Or in a narrow hallway of a building. Go there when its almost empty. May be its late in night or very early in the morning. Walk, and after a while, just close your eyes. Then come back and tell me, how long could you walk there with your eyes closed?
Sociologists should do some experiments on this with human subjects. Might tell them a lot about the human nature; about our inhibitions, self-confidence, our risk-taking nature, and above all, our survival instinct. I wonder what will be the distribution of the time that people can walk with their eyes closed over a sample population. I find it hard to guess. On one hand, I think it could be that almost everyone falls in the same 5-10 second range. On the other hand, I don't know people. I only know me. It could just be that the brave ones can do it for almost half a minute (or may be more!!) and those who play it safe can only walk for 3 seconds? Who knows.
Me, I did 10 seconds once. That's my highest, and I almost hit the wall that day.