I was at Bristol for Muse as well and can attest I was a contributor to the flat crowd. I was in the front "pit", it was not a pit, I was able to just chill against the barrier at the back and had a great view, was able to nip off for a **** a number of times with minimal fuss and just kept getting more and more cider, never ever thought I'd be able to do that at prior Muse gigs I've been too. I'd had a long day and CBA with it in the end. Especially when new tracks like Break it to Me and Propaganda are aired over Human (even that is pap).
Muse are a pantomime, I've seen them 5 times now, and each time I've got more and more irritated by it all. I'm done with them and Radiohead live now, the crowds have grown to old to care, or too young to get the older stuff. Also, Killing in the Name prior to Muse going on should have been epic... no one knew the words. Pathetic.