In Your World

Much shorter than the average Muse song which, like Dead Star, allowed the song to receive more radio play.
The song takes an influence from Bach, specifically, from Toccata and Fugue in D minor.

Trivia

Coincidentally, the main riff for In Your World is very similar to part of the music for Level 5 of the original Castlevania game. It also bears strong similarity to the riff of the Beatsteaks song "Shut Up Stand Up". The Riff also bears some similarity to the Nirvana song "Drain You".