A U2 fan that got the chance to meet Bono and request a song before the band took the stage in Phoenix Friday (5/22) not only had his request granted, he joined the group on stage to perform it with them.  In God's Country hasn't been a regular on U2 set lists since the 1987 Joshua Tree tour. As Bono and The Edge fiddled with the start of the song, the singer stepped the the mic and said 'Are you here dude? Do you know the chords?'. With that, he was brought to the stage, given a guitar and helped get the song launched.  Yeah, it probably wasn't as spontaneous as it seemed, but it was still pretty cool.

RollingStone.com