Best Superman vs Flash Covers

One of my earliest memories of reading comics was picking up a Flash comic and learning about his feats of incredible speed and quickness. One story involved the speedster changing a tire while the car was moving, all unbeknownst to his lady passenger. Well, she did say she felt a slight bump, but otherwise the Flash had done the work in secrecy. Another story showed him actually talking to himself to keep his secret identity safe. He was going back and forth, speaking coherently, and giving the illusion he was