Mullen, like the others, is nervous about the new tour. The 360 tour employs a revolutionary stage concept never before seen in stadia. It basically means that U2 will play on a round stage, in the middle of the stadium, with fans all around them. There is, as Bono will say more than once, "jeopardy". Or, as Mullen puts it: "The first night can be amazing, but it can be a washout ... that's the way the shit goes."