And I started to play. It was so beautiful. I was so caught up in how lovely I looked that at first I didn’t worry how I would sound. So it was a surprise to me when I hit the first wrong note and I realized something didn’t sound quite right. And then I hit another and another followed that. A chill started at the top of my head and began to trickle down. Yet I couldn’t stop playing, as though my hands were bewitched. I kept thinking my fingers would adjust themselves back, like a train switching to the right track. I played this strange jumble through two repeats, the sour notes staying with me all the way to the end. What effect do these descriptions have over the course of the paragraph?