The song features
Maxi Jazz rapping from the point of view of an
insomniac while he struggles to sleep ("I toss and I turn without cease, like a curse, open my eyes and rise like yeast/At least a couple of weeks since I last slept, kept takin'
sleepers, but now I keep myself
pepped"). The subject is resonant with fans of dance music, as
stimulant use is common in club/rave culture, and insomnia is a common side effect - in a 2020 interview, Maxi Jazz acknowledged how it struck a chord with clubbers: "Suddenly the song was being played to crowds who had arguably taken 50 quid’s worth of high-powered drugs and weren’t thinking of getting much sleep for days... If I had a quid for every time someone’s come up going, 'I can’t get no sleep', I’d be living on the space station". The insomniac is also rather destitute ("Make my way to the refrigerator/One dry potato inside, no lie, not even bread, jam, when the light above my head went bam..."). According to Maxi, he spent 20 minutes writing the lyrics after being given the song's title by
Rollo Armstrong, before finishing them in the studio the following evening and laying the vocal down in about 25 minutes. Although he was not an insomniac, Maxi drew on personal experience for the lyrics: he had recently suffered a painful
dental abscess which had kept him awake at night. Lines about the light going out and picking up a pen in darkness were based on the
prepayment electricity meter in his home, which would cut out when credit ran out, forcing him to write by candlelight. According to
Sister Bliss, the track's music was written in bandmate Rollo's recording studio, located in a garden shed: she came up with the song's title as she was unable to sleep, describing the experience of working in the studio during the day and DJing at night as being "like having permanent jetlag". She has stated that the song's reggae-inflected bassline was influenced by
Lionrock, whilst placing the main keyboard riff towards the end of the song "was an idea we got from
Underworld’s way of building tension: just waiting, waiting, waiting then – bang!". Sister Bliss wrote the riff after Rollo asked her to "do big strings", borrowing the idea of shifting from a
major chord to a
minor chord from
Donna Summer's "
I Feel Love". ==Release==