In the early 80s audiences at hardcore punk shows began pushing, shoving, and slamming into each other…in the friendliest of ways, of course. Today, our dance craze series heads into the mosh pit for a look at slam dancing. Plus, bassist Mike Watt of the punk band Minutemen joins us with a photo memoir. And, we get a preview of the new "Crossing Brooklyn Ferry" music festival. Guests include guitarist Bryce Dessner, of The National.