Yeah, I believe that you've touched the point where you have ever fooled one native speaker. And now, if Brits told you that secret English phoneme, you might fool a lot of native speakers in future, right? That'd be great and you'd be so cool -- you could lure native speakers (Brits) to arm you with perfect gun, and then you could turn the gun to shoot them down.
How cool!
But you've forgotten that such a coup is ONCE AND AWAY, have you? Doing it again will not work, I'm afraid.