Pendulum's 'Witchcraft,' which appears on their new album 'Immersion,' is undoubtedly electro rock rooted in drum and bass, but the Pendulum dudes are massive metal fans. More on that in a second, ...

I tell you what though, that main refrain. That's a hoot, isn't it? Not the bit where the synth first comes in, and it all builds up, with the harmonious wails and all that. That's kind of moody and ...