The track was composed for the climax of Danny Boyle's 2002 film 28 Days Later . Its title and presence in the film carry specific thematic weight:
The track's simple, driving melody and intense progression lend themselves perfectly to the metal genre. Several notable versions have gained millions of views: The track was composed for the climax of
: The song plays as Jim infiltrates a military mansion (the "House") to rescue Selena and Hannah. His brutal, frenzied violence against the soldiers causes Selena to briefly mistake him for one of the Infected. His brutal, frenzied violence against the soldiers causes
: Composer John Murphy designed the track to mirror the internal emotions and rising stress of the characters, starting with a slow, unnerving pulse that explodes into a sinister, "huge-feeling" finale. Popular Metal Remixes The story of by John Murphy is deeply
: The title refers to a scene earlier in the film where the character Selena tells Jim she would kill him "in a heartbeat" if he were ever infected.
The story of by John Murphy is deeply tied to its use as the emotional and rhythmic core of the 28 Days Later franchise. While originally a haunting post-rock piece, its natural build-up and "animalistic fury" have made it a favorite for metal remixers. Origin and Thematic Meaning