laughable expression

So tonight I was having a discussion with four people outside the university, a teacher was there leading the discussion. We talked about freedom of expression and that was interesting. The teacher recommended a book called "The J Curve", I guess I should read it sometimes. So what funny was, one of the members interrupted two times when I was talking, at the second time I asked if he could let me finish my sentence first, and he look so shocked that he couldn't breath for a few seconds. 😱😱 his facial expression was really amusing. Sorry for been verbose, I'm so sleepy and I don't know what I'm talking about  😂