Would you have chosen this option?

[BoomerSooner]

It doesn't sound like he was trying to show you guys up or anything like that, and his reply to your warning suggests it was an honest mistake. Even if he was upset with the call, his response wasn't egregious in my opinion. I sometimes think limited space for basketball coaches leads to issues that you don't see in football, baseball or soccer because those coaches can roam the sideline and essentially get away from the situation much easier than basketball coaches. If he was indeed upset with the call, it sounds to me like that is all he was trying to do: move away from the situation to allow himself the opportunity to cool down.