Coach J

What is the difference in a thrown bat, which is thrown after the batter hits the ball, and a bat that slips from a kids hand while swinging? One of my kids was given a thrown bat warning when the bat slipped out of his hand. He was then called out later after actually throwing it after a hit. Should a kid get a thrown bat warning if it is a bat that slips out of his hand during the swing? And I do understand the safety issues with either.