Songfacts®:

• This rock ballad is the fourth single from the Scottish band Biffy Clyro's fifth studio album, Only Revolutions. The album track was re-worked for its radio and single release under the alternate title of "Many of Horror (When We Collide)."
• On the iTunes track-by-track video, singer Simon Neil explained: "The whole record is a bit about my whole relationship with my wife and family and this song optimizes that more than any other."
• For the song's music video, the band teamed up with director Andy Morahan for their third clip in succession. The video is set within Battersea Power Station where the band play the song as Simon Neil desperately tries to keep his dark side at bay.
• A cover of this song re-titled "When We Collide" was the debut single by the 2010 X Factor winner Matt Cardle. In an interview with Australian radio station Undercover FM, drummer Ben Johnston said that their song must have been discovered by svengali Simon Cowell. "Britain's a small place. Everybody knows everybody, certainly in something like the music industry. He [Cowell] said it was a great song and he [Cardle] should use it."
  The use of this song for the X Factor single prompted a surge of interest in Biffy Clyro's original and it stormed into the UK Top 10 for the first time in the week after the show's final. 'Horror' originally peaked at #20 in January 2010.
• The album was named after the L.A.-based author Mark Danielewski's novel Only Revolutions. Neil explained why in an interview with Spin magazine: "I first became aware of Mark in about 2002 when somebody passed me a copy of House of Leaves. I had never really read a book quite like it. It really kind of grabbed my life in a way that other books hadn't and it kind of dominated my life - I kept re-reading it, you know, which is unusual for me with books. After we completed all our songs for our first record, I was in Mexico with my wife and I read Only Revolutions for the second time. It's a love story told from two people's point of view, and I felt like the songs we were writing were about myself and my wife, and how when you're in love with someone you can still hate them more than anyone else in the world, you can just have completely different points of view. I was reading that book and I just thought our album has to be called this."