Gerard has said in interviews that Sleep was inspired by his troubles sleeping while the band were in the writing process at The Paramour Hotel.
He said that he would have night tremors (or night terrors) where he'd convulse, feel like he was being strangled and would wake up unable to breathe.
You can hear recordings of him talking about these night terrors and nightmares throughout the song.
Gerard Way has written: 'The Umbrella Academy' -- subject(s): Comic books, strips, Comic books, strips, etc, Heroes, Robots
Gerard Cox has written: 'Gerard Cox'
Gerard Way's birth name is Gerard Arthur Way.
Gerard Way is Catholic. Which is why the customs displayed in the Helena video were that of the Catholic religion. It's also why he had "CATHOLIC" written on his neck a while back.
Gerard Douge has written: 'Pollen'
Gerard Grisey has written: 'Stele'
Gerard Bessiere has written: 'Where is the Pope?'
Gerard Mouizel has written: 'Roudneff'
Gerard Way is the one speaking at the start if Sleep. Those were recordings of dreams he had when he was going through one of his rough patchs.
Gerard Hubert has written: 'France Gothique'
Joseph Gerard has written: 'Vengeance Is Mine'
Gerard Horta has written: 'Nit a Chiapas'