Took my kid to a HIIT class the other day. It was his first one. It gasses me completely and at the end I’m usually panting on the floor for a few minutes. He walks up to me and proclaims ‘bah, that wasn’t so bad!’ The next day I couldn’t laugh harder at how sore he was. It was his first experience with true DOMS post workout. He was in agony and I was enjoying his suffering.