I think that this guy should be locked up for assault! This guy should not be teaching because he apparently has no control. I love to spar, and usually the contact level is preset before the match begins. I do not believe that sparring should be an excuse to pummel someone, such as what you describe above.
I have seen some instructors take some students into the ring to spar, after repeatedly telling them to lighten up on the contact. This session was not meant to beat them unconscious, but to humble them, so to speak. Again, no beatings took place, but the pace was picked up a notch.
Mike
I couldn't agree more, this guys should have criminal charges brought against him. There is no excuse for an instructor to behave like this.