Did anyone that attended the concert today see the amount of ufos that were showing up when the stage lights were aimed at the sky!?!? At least 30,
and while muse was opening one crossed the stadium very low with it's lights on full blast!
I imagine it's just like going to the zoo for us. They probably drop in all the time to check out weirdos like Bono.
Seriously though, from the perspective of an alien, a couple hundred thousand people turning out to worship someone yelling into a mic and playing
musical instruments probably makes no sense to anyone from another planet.