As much as I hate Bono and the Edge, Bad is one of the finest songs I’ve ever heard.
http://www.youtube.com/watch?v=lfA2qBIJrYg
No really, and he admits his sh!t is weak in that "It Might Get Loud" documentary when he plays those notes without his effects pedals (he has a different set of pedals for each damn song, he can't even work his gear). I know guitarists who travel the world and have gotten by all that time with 2 pedals (one for amplification, and the other for distortion) and that's it. Then again, he has one of Fred Sonic Smith's guitars...