Pink Floyd’s Wish You Were Here came on the radio the other day. It opens with a long and sparse guitar intro, in which a cough can be heard across one of the tracks. The sound is startling, as though someone unexpected was suddenly discovered to be in the room. More than once I’ve looked over my shoulder when hearing it. It’s what I love about the song, a reminder that this moment has been and will continue to be shared across distance and time.