Like most of Massive Attack's albums, the music often defies categorisation, ranging from
R&B (title track and "Sly") to
hip hop/rap ("Karmacoma" and "Eurochild") to
reggae-tinged
synth-pop ("Spying Glass") to classical-influenced
electronica instrumentals ("Weather Storm" and "Heat Miser"). The album follows
Blue Lines structurally, to the point that the font used on the cover of the album is the same,
Helvetica Heavy Italic. The album cover also nods to
Blue Lines, revealing a futuristic, impenetrable wall behind a mostly-burned version of this previous album's artwork—implying that the depicted "flammable gas" had been ignited.
Tricky again appeared on the album, rapping on the tracks "
Karmacoma" (whose video was directed by
Jonathan Glazer, and which featured a sample from
The KLF's "
Dream Time in Lake Jackson" at the 2:00-minute mark) and "Eurochild" (which featured samples from
Startled Insects' "Cheetah" and
Liquid Liquid's "Lock Groove (In)"). ==Reception==