Why am I getting Upset?

Sitting on the subway train heading into work this morning, a young man got on and sat next to me. I saw him take a swig of his Pepsi, turn on his music-- he had ear phones on-- and begin to bop and sway. Soon, he got more comfortable and started lip singing the lyrics-- quietly for the most part, but once in a while, a sound would break through the silence. As he got even more comfortable, he added hand gestures-- basically, his version of channeling the original artist either giving a live concert or recording in the confined space of an isolation booth. At first, I found myself getting irritated. Observing this, I soon realized this was because I was concerned he would start singing in full voice. A few weeks back, I got on the train with another passenger who also had on headphones but insisted on singing explicit song lyrics, loudly. So loud that those already in the car and every new passenger that got on kept looking in his direction. I think it’s safe to say we were all wishing he would stop, but at the same time, none of us felt it wise to approach him. First off, he was a Goliath of a man. Secondly, if this Goliath saw no issue with singing explicit lyrics in a crowded train, full voiced, what was to stop any request to tone it out down from resulting in potential physical or emotional violence? At one of our stops, two cops actually came on and spoke to him about his conduct. He waited until they got off, the doors closed, and then resumed his loud rendition of the song playing in his ears. This was after he cursed them out for daring to approach him in the first place. Returning my attention to the young man sitting next to me, I made myself observe what was happening in real time. He wasn't singing out loud. He wasn't being what I would consider noisy or inconsiderate to his fellow passengers. He had on quality headphones because even though we were sitting right next to each other, I couldn't hear the music. And honestly, he was simply enjoying himself-- like I would if I were playing music I loved in the privacy of my home or in a car with friends (except at home or in the car, I would be singing loudly ;) :D Basically, I came to the conclusion that I just needed to calm down and not use past memories (Goliath) or imagined future concerns (this guy breaking out into song in full voice) as excuses to get upset at something that wasn’t actually happening in the present.