He patiently instructs her on where to pluck the strings.
Walking back, we see another lesson taking place.
A clarinet sounds out from the traffic below us. The people wait to enter the USA. We watch for a moment. No monies seem to be tossed from cars. He doesn’t appear to be a busker. No open instrument case is at his feet. He plays on.
Then a police officer in black enters the scene and asks him to leave. There is no confrontation. The music stops, and the clarinet player walks away into the surrounding scene that is borderland.