A Strathtay coach driver gave chase after an Angus junior footballer threw a glass into his bus, a court heard.
Liam Bailey from Montrose appeared at Forfar Sheriff Court and admitted assaulting Ross Day following a night out last year.
The court heard the first offender told a waiting stranger at the town’s High Street bus stop he was going to “glass” the next driver to come along on September 26.
The 19-year-old engineering apprentice had “no recollection” of the incident and later apologised for his actions.
Depute fiscal Bill Kermode said the witness was sitting at the stop around 11pm on the Saturday night, and was approached by Bailey, who was holding a glass tumbler and drinking from it.
Mr Kermode said: “He stated to the witness, ‘the next bus that comes along, I’m going to glass the driver.’
“He was advised against that and they continued chatting.
“A few minutes later, the complainer arrives in his bus and on opening the doors, the witness boards the bus.
“The accused attempts to board but the bus driver advises he was not getting on as he has a glass.”
The accused then launched it at the driver’s protective panel and its contents landed on the driver.
Mr Kermode added: “The accused ran off in the direction of George Street, and the complainer chased him for a short distance before losing him to sight.”
Police traced the accused a short time later in Sharky’s nightspot and he made no reply to caution or charge.
Solicitor Nick Markowski said the offence was “out of character” for the second-year engineering apprentice, who had been drinking vodka with friends.
He said: “Mr Bailey has absolutely no recollection of this incident and would like to apologise to the court and to the bus driver.
“Your lordship will not be surprised to hear he was under the influence of alcohol.
“Bus drivers have a window to protect them from this sort of thing, but not normally on Montrose High Street.
“He’s reporting to me that since this incident he’s avoided spirits.”
Bailey, of Provost Mitchell Road, was fined £460.
Sheriff Pino Di Emidio said: “This is an incident where somebody in the course of their employment has been exposed to behaviour that is unacceptable.
“You should be in no doubt that if there is a repetition of this behaviour, the consequences to you will be very severe indeed.”