Callahan comes alive in Chicago, with Jim White, Matt Kinsey and special guests Nick Mazzarella, Pascal Kerong'A, Nathaniel Ballinger and Natural Information Society’s Joshua Abrams & Lisa Alvarado. Why, Bill? “Songs tend to mutate after they've been recorded. These songs were mutating faster than usual. Like whatever happened to Bruce Banner in the lab – I knew these songs were about to get superpowers…this change needed to be documented.”