I stumbled upon a video filmed from the audience as Maiden's set was starting, and it was contagious in its enthusiasm. Everyone singing along, jumping together.... they seemed so "into" it and concentrated, maybe with other audiences you'd hear, from a crowd video, a lot of random "yeeeh" and "whoooo" but no, everyone singing and jumping and making a big roar during the chorus. Impressive.
(And I still hope the entire performance of Maiden shows up... not the one with the intro cut and Fear of the Dark mute that is even reposted in other news sites)