I think you have to sort of accept that nobody really knows where it`s going so there has to be a lot of impulsive kind of attitudes. So it`s like a train that`s moving and you don`t quite know where it`s going but you try to steer it in the best way you can realizing that it may go in different places that you had no idea.

I would say [Lamar] Kendrick, it`s always fun to see what happens when Kendrick takes the stage. And my two oldest kids are huge fans of him.

I guess that seeing yourself on a screen is something that you get used to. Let's face it, these days, there's really nothing that you do that doesn't get filmed.

Metallica's the only band i've ever been in. I'm not sure that when it ends in five, ten years, I'm going to put an ad in the paper saying, 'stupid drummer looking for stupid people to play music with,' Metallica is it and I think when that ceases, that's it.

Stretching your parameters is a necessity if you wan to keep growing, and sometimes the best way to do that is to dive into the deep end.

What Metallica always tries to do, as we go around and play a lot of the same cities, over and over again, year after year, is to give a different experience. We try to never play the same venues, or if we play indoors, we'll play outdoors, and all that type of stuff. It's always about just trying to do a different kind of experience.

Hugh [Evans] called us. And obviously this has been on our radar for all the years it`s been going on. And each year obviously reaches more and more people, and it`s high profile. Hugh reached out to our manager just down the street. And we said we`re here [ on GLOBAL CITIZEN in the Central Park] to help and do whatever we can.