Did you ever not take a chance?

Have you ever built something up in your mind for days and days to the point where it seemed an absolute certainty, or at least a theoretical possibility and then totally chickened out?

Have you ever not even taken the chance at taking the chance because once the moment was appropriate you were suddenly 13 again and terrified? Heart racing palms sweaty, mouth completely inarticulate?

Damn self consciousness, damn insecurity, damn it all!