Do we really practice good listenning?

Last night, a group of old friends invited me to join them on a night of thought exploration and knowledge sharing. We haven't seen each other for long time. The joy filled my heart for being presented with this opportunity. The night went so well. I had the chance to give a 30-minute speech to introduce a book I read. The objective was to entice people to read it. They got moved by the speech and showered me with their questions which indicated that the objective was accomplished. Near the end of the gathering after we had a delicious light meal, one of my friends who's like a life mentor to me was telling a story of a friend of his in relation to some discussion that was going on. I did a terrible mistake of interrupting him. It wasn't nice of me! I hated what I did. Obviously he didn't like it and I saw this in his eyes but sadly I didn't drew back my interruption! He decided to gulp it down to continue his point after I finished my interruption! I felt so bad of myself. This is not me and this behaviour of mine was totally unacceptable of me. His graceful attitude towards me made him not to comment whatsoever on my wrong behaviour and he let go. The following morning, the terrible feeling of what I had done was agitating me! I decided to apologize to me friend and seek his forgiveness, which I did. So, this is a humble reminder to myself in the first place; be a good listener! and let's remember it is a lifelong training and disciplining of oneself. Despite the fact that I teach it and demand it of other, I forget about it sometimes and violate doing the right thing. When others are talking, just listen. It is a bad habit when listening to other to be partly busy thinking of what to say back to them instead of being focused on listening well to end up with mediocre results in both.