" It is unimpressive to interrupt another person while they are talking. Interrupting someone in mid-sentence demonstrates that your focus is on yourself, not the person talking. I had a friend who used a humorous retort whenever someone would interrupt him. He would graciously, albeit sarcastically, say, “I’m sorry, I didn’t mean to speak while you were interrupting.” It always got a laugh, yet he was cleverly letting the intruder know of his infraction without being too confrontational. "

― Susan C. Young , The Art of Action: 8 Ways to Initiate & Activate Forward Momentum for Positive Impact (The Art of First Impressions for Positive Impact, #4)