"The opening was the audio equivalent of Blade Runner's visuals," said Bono of the gibbering, media-disseminated voices at the beginning of U2's futurist opus "Zooropa." "If you closed your eyes, you could see the neon, the giant LED screens advertising all manner of ephemera." For the track itself, engineer Joe O'Herlihy recorded jams from soundchecks on the Zoo TV Tour, the Edge combed them for backing tracks, producer Flood mixed in bits from a separate studio jam, and Brian Eno added synths. "It was a time when everyone was all indie and gray and dull," said Bono. "It's amazing to be walking around these modern cities like Houston or Tokyo – and embracing it."