Lunatic Calm were a UK-based electronic music group, specializing in big-beat hardcore and down-tempo trip-hop. Formed in 1996, they comprised of Simon ’sHack’ Shackleton and Howard ’Howie’ Saunders. They composed and produced several high-energy tracks and two albums. The group are most famous for their track Leave You Far Behind, which has appeared on numerous movie soundtracks including The Matrix, Charlie’s Angels, and Mortal Kombat: Annihilation. Together, they have also done numerous remixes for artists such as Bush, DJ Scissorkicks, and Curve.
Lunatic Calm quietly split up since the release of Breaking Point in 2002, with Simon placing the blame on record labels (this was also a factor in the numerous delays in releasing their last album). However, Simon has been an active DJ for many years, operating under the names Elite Force and Simon Shackleton and winning multiple Breakspoll Awards and a Beatport Award for best selling breaks track in 2010.

The duo parted ways after their second album in 2002 but in 2019 announced they would be working on new material.