Use "chorus line" in a sentence

1. Jack joined in with the chorus line on every marshalled step,

2. When Kate awoke, she felt the pain in her head pounding like the many feet of a chorus line on a stage floor

3. By the way, a chorus line in this same song goes, “I will sing this victory song”

4. My labored breathing eased, though my lungs still burned and my head was pounding like a chorus line of stiletto-wearing hippos dancing on it