Good Night Bubbles

Recently I had a glass of champagne (instead of water or tea, as a matter of diversion ;-P) standing within my grasp beside my bed and I fell into contemplation … watching a string of tiny bubbles rising up in an exact interval, one after the other, endlessly. But every (about) 30th there came another on the passing lane … passing the row. Just one single one! In an exact interval … So beautiful, mathematics!