I like the idea of a more experienced umpire being on the field with the teenaged ones. I had a similar situation in a girls fastptich league a couple summers ago where I was the home plate, and my assignor's stepdaughter worked the bases. Coach didn't like a call she made so he went barrelling out at her and she had the deer in the headlights look. I jogged over, hoping the coach saw me out the corner of his eye. He did and hightailed it back to the coach's box. I then asked him what was the matter and he said never mind. Later, my assignor said that the coach admitted he didn't want to be toe to toe with a guy who looks like he was a linebacker in high school or something.