What is your favorite recording with a quirck

I recently began to play some CD's I had stored away. Two of my favorites are "Rhapsodies" Stokowski RCA Living Stero 09026-61503-2 and Shirley Horn "You Won't Forget Me" Verve 847 482-2. These stick in my mind because they are recorded well. But also they have something quircky present.

In the Stokowski recording on track #6 Tristan und Isolde when I listen closely I hear a whirring sound like a turbine starting up. I asked a friend who lived in New York city and he suggested it was the subway underneath the building where this recording was made. Intersting I thought as my audio system could resolve and reveal this sound caught on the rcording.

Another moment of testing resolving ability was on the title track of Shirley Horn's recording of You won't forget me. During the song Miles Davis makes what seems to be a sarchastic sour note and Shirley in response whispers a**hole.

Have you any favorite quircky tests of resovling power on recordings that you have found?