I Still Haven't Found What I'm Looking For, March 26, 1992, Cleveland. (Coincidentally my own Zoo TV show -- thanks yimou!!)
At the start of the song, Bono reminds us all that the U.S. elections are coming up. We have to choose the right candidate, he says, "or we're all fucked." The band then plays a beautiful version of a beautiful song. Not an off note, not a missed lyric. At the end of the song, the audience takes over. Three minutes of one united chorus: "But I sti-iillll haven't found what I'm looking for." This singing eventually dissolves into the typical pre-encore chanting and screaming, but for three minutes, it soars.
This is "definitive" live U2. Bono speaking passionately about something that affects us all. A beautiful song performed perfectly. And an audience that has heartfelt involvement from start to finish, and never wants the show to end.
That, for me, is what live U2 is all about.