An inmate at HMP Bristol who attacked prison officers has been jailed.
Jeffery Warren had lacked sleep and medication when he snapped as he was escorted to breakfast, Bristol Crown Court heard.
He hurled homophobic and racial slurs at staff and punched and kneed prison officer Mark Greig to the head.
In the course of a restraint which ensued Mr Greig suffered a rupture to his right bicep tendon.
Warren, 48, of Willowleaze in Gloucester, pleaded guilty to causing grievous bodily harm on January 22 last year.
The recorder Mr Paul Dunkels QC jailed him for two years.
He told Warren: "Prison officers have a difficult job to do.
"They are performing important public work.
"Assaults upon them will not be tolerated on any basis.
"I accept your lack of medication and interrupted sleep made you more irritable that morning.
"You are capable of aggression and violence to people in authority in any event."
Chloe Griggs, prosecuting, told the court PO Greig and a colleague collected Warren for breakfast at 7.40am and there was a mention about rubbish in his cell.
It was then Warren turned from placid to confrontational, Miss Griggs said.
He told officers: "Why should I clean the f***ing cell?
"Its in a s*** state, you put me in it, you f***ing clean it."
At a nurse's station Warren referred to women officers as "f***ing lessers" and when he was told his language was homophobic he made threats of violence.
On returning to his cell he removed his T-shirt, span around and punched PO Greig several times.
In a tussle that followed Warren managed to raise his leg and ram his knee into Mr Greig's right temple.
As officers restrained Warren he told one he had a banana for him and advised him to "go back to the jungle".
Later Mr Greig developed a very sore arm, struggled with daily activities and was diagnosed with the ruptured bicep tendon - an injury which he feared could end his career.
Stephen Youngs, defending, stressed that at the time his newly incarcerated client had not had access to a sleep apnea machine or medication and was not himself as a result.
Mr Youngs said Warren had apologised for the incident and, after benefiting from sleep and medication, had spent the rest of his six month sentence for assault without a problem.
The court heard prison would mean the loss of Warren's supported accommodation and his being unable to take up a job offer.
