Trust me...where I'm from a kid that size is pretty average. Bunch of toe headed German farm kids. Remember, youthful skill, talent and energy is trumped by wisdom, experience and treachery.
Which is beside the point. Young Mr. Martin was a skinny 150 lb kid and stout Mr. Zimmerman couldn't handle a kid that small armed with a bag of skittles. I don't know to many adult men who couldn't handle a teenage boy armed with skittles. This does not speak well of Mr. Zimmermans mental acuity. Let alone his physical abilities.