The Independent Police Complaints Commission (IPCC) in England is investigating an incident involving police who tasered a man in a coma because he was unresponsive.
Mr Gaubert said he was on his way to meet friends when he suffered a hypoglycaemic fit on the bus which left him slumped on his seat clutching his rucksack.
Armed police were called to the bus depot in Headingley and when he failed to respond to their challenges he was shot with the Taser.
He said as this was happening, another officer was pointing a real gun at his head.
He was restrained and eventually came round in the police van.
He said it was only then that the officers realised it was a medical emergency, despite him wearing a medical tag round his neck to warn of his condition, and took him to hospital.
