Fast flowing piano arpeggios accompany a simple theme giving a sense of motion and pursuit , with a hint of mystery. One use might be for a scene in which a detective is following a suspect in his car. The final chord has a sudden shift of harmony that gives a feeling of ambiguity. Has the mystery been solved or is there more to discover?
“On the Case” is used in this app game promo. https://www.youtube.com/watch?v=l_FO0sT0Zi8