For me, it began with Steve Martin. In addition to his talent as a comedian and actor, Martin is a superb banjo player and the leader of a bluegrass band called the Steep Canyon Rangers. On March 21, nine days after I began self-isolating, Martin posted a 76-second video on Twitter that shows him standing in the woods, playing a song. He turns on the camera, plays, and then turns off the camera without speaking. The title of his video is "Banjo balm."