Yes! In that "Sunday Bloody Sunday" video, where he's jumping around in those tight black jeans and the camera's situated low and behind him, his ass is truly a sight to behold. Here's an animated gif from the video
http://www.gifsoup.com/view1/1471567/bono-butt-o.gif
Thee, I love you. That is exactly the image I've locked away since 1983.