I got two ideas from scenes that I think are much stronger.
I feel that scene from the cartoon show where he runs so fast he goes around the globe several times has something extra this one is missing: distance. Imagine combining that with time travel, something similar to Superman in 78 going back in time.
Another thing is that he is a lone speedster, imagine if he had to run faster than someone else, a villain with his powers like Zoom. The template for the best possible showcase of racing for a Flash movie where he has to run faster than someone else already exist, it is the final lap from Speed Racer ( why have Barry talking to himself when you could have the voice of his father talking to him?). Copy Speed Racer and you top this scene.