When I was in line at one of the NYC shows last tour, Bono came by and did the autograph thing - it was a total madhouse of people reaching and crowding and yelling his name, I just stood back and watched from afar. I didn't want to be anywhere in that mess.
Plus, the GA line numbering got all out of whack after that, and no one ever came through to check numbers .... I have some bad concert karma coming to me because my friend and I ended up much closer than we should have been.
But anyway, I'm really grateful that I got to have a Bono moment away from that kind of chaos, that it was just a small group of people, and those of us who had something to say got to say it with him giving us his full attention. (And to quote NSW, I hope that doesn't come across like bragging - if that's the only encounter I ever have with any of them, it was a great one to have, and it's a very happy memory for me.)
And that I didn't say anything completely embarrassing.