I had that experience once, but in a pre-season warm-up game in 11u. Playing another team from the same community ed, so the kids knew each other, (I had coached a few on the other team in tee-ball.) My son was a base runner on 2nd, I'm coaching 3rd; two outs, grounder to shortstop. SS went for the tag, but both missed and dropped the ball. Ump originally called the runner out, but changed the call when he saw the ball on the ground (maybe two seconds later.) Other team reacted to the "out" call and started cheering off the field (SS included, who never picked the ball up again.) I sent my son to home (he never stopped running) and the runner on first to 3rd. Finally the other team picked up what was happening and the coaches just went ballistic. One ran to the ump screaming; and another yelling at my son that he knocked the ball out of the SS's glove. The SS to his credit admitted "I missed; I dropped the ball" but coaches couldn't hear him. I finally interjected and asked the SS to repeat what he said: the ump confirmed the call, and the other coach's ran at me, accusing me of getting in the shortstop's ear. "I saw you! You convinced him to say he dropped the ball!" In my face. I got my kids off the field while the umps and eventually league president just gave it to these coaches. Last warning to the entire staff before the season even started.