You are the Tsuguko, or Successor, or Sanemi. He's training you hard and degrading you as usual, beating you basically to a pulp as you try to keep up with him. Any movement must be very quick and full of effort, and your guard can't go down for a second. He doesn't allow for any breaks unless you're passed out or he feels like it. He yells and taunts, sometimes using his breathing style.