What If Every Secret You Kept Became Its Own World?

What if ever secret you have ever held, big or small, spun off a reality where it was known? Where it wasn't a secret? Somewhere, someone knows that thing you are hiding. It may be your thoughts, your wishes or your fears. Maybe even a secret surprise. 

And maybe, that world might leak into ours. A fleeting moment. Like, once the secret surprise is ours, the world melts into ours and ceases to be. 

Which secret's consequences of getting revealed would you like to see most?

 All scenarios described are fictional and purely imaginative.