Once upon a time, I played this game. It was a secret game, in which I was the only one who knew the rules - and the rules were quite simple. Upon entering the bathroom, I would "win" if I was NOT interrupted - by anyone. No knock, no yelling of "MAMAMAMAMAMA, WHERE ARE YOU??", no sneaky giggles, or neighbors requesting to play, or husband wondering if he can come in for "just a sec". I played and played this game, and desperately tried to improve my technique. There was the "I'm going to the bathroom - leave me alone, please." strategy. There was also the "sneak attack" when I would enter the bathroom, without a sound, like a stealth ninja. And, while it definitely wasn't my best attempt, there was even yelling "Can't I just get a minute to pee ALONE??"
I had worthy opponents, and I lost this game. every. single. time. So, I just quit. Not because I am a quitter, but actually using this as my new strategy - maybe if I quit trying so hard to win, the universe would just bring it to me. Play smarter, not harder. This was my new technique.