Visiting coach chews on Home player

[Loudwhistle]

Varisty boys tonight, I whistle a foul on the visiting team, push, we are in the bonus, shooter goes to the line and makes the first free throw, visiting coach looks up just before the ball is administered for the second free throw and says hey that's not the guy that got fouled, I say yes it is, I'm tableside. The player at the line says, yes I 'm the one that got fouled, gym gets real quiet, visiting coach says, "don't talk back to me you just play the game" I did not like the attack on the this fine player (I've know him for 17 years) any suggestions if this happens again? Felt like whacking him but didn't, don't know if that is worth a technical. Never seen that happen before. Any thoughts?