Nacho:
I'm not asking you to, "doubt these two guys," as you say. Just advising you to follow the "prudent man rule." In my line of work, I see just too much of the patients who didn't follow care in exercise, yoga, etc., and are now regretting it (and I'm speaking from the place of a grandfathered (RYT)yoga teacher and practitioner, also). Besides, you specifically mentioned "EXCRUCIATING PAIN," and also for 15 minutes.
I know very well what Master Lin teaches in the Level Two course. Master Lin's teaching is sound, practical, wise and wholesome. You, on the other hand, sounded like you were taking it to a different level of force. That is why you received my CONCERNED CAUTION!
I'll always prefer to err on the side of caution; as opposed to injury and disability and chronic pain. But, of course, YOUR'RE ALWAYS FREE TO CHOOSE YOUR OWN PATH.
Much Love ....
