OK so I was shuffling through Muse on Spotify and Stockholm Syndrone live at HAARP comes on. Near the end they start doing some free-style type rifts which is par for course at live performance. Then, at 6 minutes or so, on a track all the way back from freaking 2008, the Psycho riff starts playing!!!! Does this happen much with Muse toying with a riff but not having a song for it? Bizzare...