The radically unorthodox ‘rage’ approach toward the ancient spiritual and physical practice went viral online at the hands of Canadian yoga practitioner Lindsay Istace, a professional contortionist and fire eater.
"When I started going to yoga classes, I felt like I didn't really fit in at a lot of those different studios," Istace said to CBC.
To make yoga more useful for her needs, Istace altered classic yoga poses and swapped gentle music accompaniment with heavy metal. She soon found that the innovations worked, and other practitioners joined her.
At her classes practitioners scream and swear as well as make offensive gestures like sticking their middle fingers out. She observed that, when people allow themselves to get to the boiling point in a supportive environment, emotional pressure is relieved.
"When you create a space for yourself to be angry and to shout and swear and scream, suddenly it's hard to take yourself so seriously,” she explained. "So it goes from anger to laughter pretty quickly. And we have a lot of that going on here."