Have you ever been 'unmasked' by someone in real life or have you ever 'outed' yourself to someone for whatever reasons?
In my case it never happened, though I was close to telling a good friend once but I don't know if he would have believed me anyway.
The closest I've come to being unmasked is I got caught in a big lie once but the people around me saw it more as a phase in my life than my true nature.