Most every show on U2’s 360 world tour has ended with “Moment Of Surrender,” but before walking offstage last night in Nashville Bono saw a blind fan upfront holding up a sign saying he wanted to play a song for his wife. “What do you want to play?” Bono said to him. “Get a guitar for this dude. Gents, we have a surprise guest.” The man said he was really nervous, but once handed Bono’s acoustic guitar he began playing “All I Want Is You.” It started with just Bono on vocals, but soon enough the entire band joined in for a moment the man is unlikely to ever forget. When it was all done, Bono even gave him the guitar.