I am a member of the US Air Force and for the first time in my life have been separated from my fraternal twin sister. We were not always as close as we are now.

My sister has always had the strongest personality. I was always a little quiet but silently strong so we would clash a lot in our younger years. I recall a time when we were in a Garden Ridge store and my mother was with us. My sister and I were in two different aisles looking at different decorations. I started thinking about a song from the Musical GREASE and started singing a verse in the middle of the song out loud, when I heard an echo of the same verse being sung on the other side of the aisle I was in.

I ran around the corner hardly daring to believe, but sure enough I met my sister at the end of the aisle with a look of utter astonishment on her face that I am sure reflected mine. And a few feet away my mother was standing there looking just as disbelieving.

What are the odds that two people who aren't even looking at each other or talking with each other start singing a random song, starting at a random verse?