Elbow violation

[Adam]

I don't think this coach really knows the rule that well; kind of like yours. The court had a restraining line, and we whistled one of his players for a throw-in violation when a teammate of the thrower was outside the restaining line. Sideline throwin, and teammate was about 30 feet from the thrower but completely outside the restraining line.
This was the home team. Coach thought it was a warning the first time, so I had to take a moment to explain to him that it's a violation on the offense, and a warning on the defense followed by a technical foul on the defense for future offenses. We ended up calling about 4 violations and one delay of game warning in that game for that.