Normal Conversation Lessons Needed!

Two days ago I told a student that the "repercussions of his actions could be extensive and costly." A young man on the same row looked at me, dropped his jaw and squinted his eyes at me, and then shot his hand straight up to ask me a question. I called on him and he said, "Mr. Gibson, I don't mean any disrespect, but... have you ever considered taking normal conversation lessons?"