What is Kundalini Yoga?

My first introduction to Kundalini yoga occurred at a retreat in Costa Rica, atop a mountain in a room that had glass from ceiling to floor. The view was remarkable and as I followed the teacher’s lead, practicing breath of fire (sometimes known as kapalabhati breathing) while moving and twisting my torso from side to side, there were butterflies swarming outside and birds soaring over the trees with the ocean crashing below. After 20 or so minutes of repetitive and intense breathing, I was filled with a sensation of bliss that brought tears to my eyes. In this moment, I knew that everything was okay. It was as…