Less intense moments, like a beautiful Machines, bring a weighty gravitas, as tens of thousands of people chime that, 'I've forgotten how good it could be to feel alive.' And it may be out of context from the song's original muse of the singer's mother, but after two years of devastating sadness, Simon's words have a vital poignancy. In full sing-along voice, it becomes a reminder that life is there to be, in his words, savoured.
Once again, Biffy Clyro have triumphed in a massive setting. Like that should come as a surprise. But in the wake of KISS and Iron Maiden, it's reassuring that Download has younger bands of this brilliant, world-class caliber to match their weight. Incredible.