So it feels like an ever-new mystery to get overpowered in fight training by short, thin, or otherwise gracile people who, it seems to me, can’t possibly have as much power. Not just outmaneuvered and outskilled, but manhandled or just plain pounded. I’m talking thin teenagers, featherweight women, even a girl who’s too young for PG-13 and weighs less than my checked luggage. What gives?