More confirmation that reality is only what the brain decodes it to be.
'After a horrific motorcycle accident, Warren McKinlay, 35, was convinced he was dead. He didn't think he had gone to heaven. He believed he was marooned on Earth as a walking corpse.
The mechanic, former soldier and father of two from Braintree, Essex, was utterly gripped by the notion he was a ghost.
'I genuinely believed I'd died in the crash, but for some reason my spirit hadn't moved on. I refused to eat because there was no point,' he says. 'I'd sit for hours in a room refusing to talk to anyone.''
Read more: The man who thought he was a ghost