Technicals

[Bad Zebra]

Sounds to me like you were probably justified whacking the coach for his comments and behavior but you threw gas on the fire by telling him to sit down. As stated by others, there's no rules basis for that and it probably escalated the situation with the head coach.

Additionally, the assistant was correct and was likely really trying to help you...your response to him sounds a bit dickish as well. Not trying to be harsh, but in my opinion, I'd say you could have handled the entire scenario better and you would have come off a good bit more professional. This is a perfect example where specific rules knowledge could have helped you (assuming its NFHS rule set). If this coach were to complain to your assigner, he'd have a legitimate gripe.