Damn that rock and roll. It's just soooo noisy.

You'd think there was only one guy in the band, judging from these pictures.

Official site of the designers who created U2's video screen

"A 50 Ton expanding video screen that operates continuously throughout the duration of the concert. Videos remain proportional in scale to the size of the screen at any stage of its deployment." Lots of pwetty pictures with this one.

"The Irish singer recognised Barcelona's achievement in winning the Spanish league, Copa del Rey and Champions League and congratulated the Blaugrana boss for that."

"Based on Hoberman's patented Iris structure, this "fusion of architecture, stage scenery and extreme technology" stretches upwards to form a 7-story cone around the band, displaying footage directed by the Irish artist Catherine Owens."

"On the exterior of the “skin” of the structure are 36 orange disks also known as polyps. Underneath each polyp/disk are eight custom LED fixtures, each containing 60W RGBW LEDs." Say what now?

"Introducing the U2 Mobile Album". Hands up, who here has a Blackberry?

Neil McCormick writes: "With songs as the link between all the individuals in the venue, these extraordinary frontmen become our conduit to a communal moment of surrender."