Son got on a bus in Paris a couple of weeks ago, headphones on, tapped his card to the payment machine and his music went silent he reached into his pocket to answer the phone and NO PHONE, he turns around, a guy is getting off of the bus and two immigrants step in front of him and say where are you going? you paid, get on the bus, doors close the bus pulls away.
I’d bet your son kept the headphones in his pocket after that. Situational awareness is important. I’m glad he is okay.