Its definitly a Scottish thing I think lol. Heard it last night during Kings Of Leon's (sublime) Slow Night So Long and also during Franz Ferdinand's Take Me Out. I think we just like to sing and a lack of words ain't gonna stop usI was just reading Roadie #42blog on the coldplay website about this gig.He mentioned that the fans were singing the guitar parts as well as the actual songs! I'm beginning to think this is some sort of tradition whenever a band play the SECC. I saw Arcade Fire play there last year and the fans did exactly the same thing.Everyone was singing the violin part of Rebellion(Lies) even after the band had stopped singing the song haha.It must be a scottish thing!