He was MC Mr Napkins when I first saw him rocking the mic with a comedy rap in Cambridge. Since then he's shed the stage name and is rocking the world as Zach Sherwin. How did the evolution occur? Where does comedy rap exist in the world of comedy? What's it like writing for so many different shows (Crazy ex-girlfriend, Epic Rap Battles of History) and what does it feel like to have your bomb happen in front of one of your comedy idols? All that and more on this weeks Bombing!