A 40-year-old man who struck and knocked another passenger off a bus in west Belfast has been jailed for four months.
Seamus McGranaghan targeted the man for trying to calm him down on the Glider service.
McGranaghan, of Doon Road, Belfast, also attempted to headbutt and bite police officers during his arrest.
Belfast Magistrates' Court heard he initially exited the Glider following a commotion in the Stewartstown Road area on August 13 last year.
Crown lawyer Mark Conlon said: "However, the defendant returned to the bus and struck a male passenger, causing both of them to fall off the bus".
McGranaghan tried to punch a window of the vehicle and instructed the driver not to move.
Mr Conlon said the victim was attacked for intervening as "the defendant had been shouting at an older male, causing a younger girl sitting nearby to get upset".
"The injured party went to calm the situation down when the bus had stopped," he said.
Police detained McGranaghan at a nearby pub, but he struggled amid efforts to apply handcuffs.
The prosecutor submitted: "He then sat up, attempted to headbutt one officer and bite another officer, telling police to f*** off".
McGranaghan pleaded guilty to common assault, attempted criminal damage to the bus, two assaults on police and resisting arrest.
His barrister, Michael Boyd said McGranaghan was "deeply embarrassed and ashamed of himself", adding "he had far too much to drink and lost his temper".
With McGranaghan currently serving a prison term for separate matters, District Judge Steven Keown ordered: "There will be four months custody, effective from today".