Wow, that was a mouthful. If that line of musical jargon captured your attention, I present to you a YouTube video by Adam Neely on "The most elegant key change in all of pop music". He analyzes a critical key change in the performance of All By Myself by Celine Dion, how it makes you feel and how it tells a story. I have just enough music theory to follow his discussion and I found it fascinating. It's not a short video being nearly 30 minutes long, but as a musician it is incredibly interesting and thought provoking. If you decide to watch through it, I wonder if you found it interesting as well?