Throughout Northern Ireland's Troubles, hijackings by paramilitaries became an all too frequent occurrence for bus drivers and their passengers.
Ulsterbus, which celebrated its 50th birthday this week, had 1,500 buses destroyed during the Troubles.
However, the impact on drivers was even more severe - 12 lost their lives and many more were injured.
Ulsterbus driver Raymond Bell was hijacked five times, with three of his buses completely destroyed.
"Normally, what they did was to get someone to stand at a pedestrian crossing and as you went down the road they would have stepped onto the crossing to get you stopped," he told BBC NI's Good Morning Ulster.
"Once you stopped, all of a sudden the doors would open and there would be masked men with either cudgels or a gun and they'd say 'we're hijacking your bus'."
Mr Bell said drivers tried not to dwell on the threat because, if they did, they wouldn't have gone into work.
However, he said the incidents did have an effect.
"If you were hijacked and you weren't injured, you came back to the depot and you continued your night's work or your day's work after that," he said.
"Or the company would have said 'we'll cover your duty for you, see you tomorrow if you're able to come in'.
"Quite a lot of drivers suffered mental issues and also injuries and it stayed with them on the job and also many left the job because of issues like that."
The managing director of Ulsterbus during some of the darkest days of the Troubles was former Luftwaffe World War Two conscript Werner Heubeck.
He became famous for carrying bombs off hijacked buses.
Frank Clegg, a former colleague of Mr Heubeck, worked as general manager for services for Ulsterbus.
He said if the company didn't keep the buses running, they weren't serving the people of Northern Ireland.
"Buses represented normality - having buses on the road was lifeblood for commerce, for getting people to and from work," Mr Clegg said.
"So with all our colleagues - drivers, engineers - we kept the buses running and the service running.
"We didn't know how many buses we were probably going to have the next morning, we didn't know how many drivers, because unfortunately they suffered assaults and hijacks, but we had to keep services running and that meant changing timetables overnight in certain instances.
"It was a case of working together, it was a case of keeping things going.
"It wasn't defiance against whatever, it really was that was what our job was."

However, Wednesday's gain of 12.1% paled by comparison with its 66% plunge on Tuesday.
At the other end of the scale, advertising giant WPP's shares sank 11% after it reported slowing sales.
At the close, the FTSE 100 was just in positive territory, up 0.91 points or 0.01% at 7,382.65.
On the currency markets, the pound was down 0.3% against the dollar at $1.2786 and down 0.63% against the euro at 1.031 euros.

Annie Besala Ekofo, 53, and Bervil Kalikaka-Ekofo, 21, were found dead in East Finchley on Thursday.
The Met Police said a 24-year-old man was arrested on Sunday on suspicion of murder and is in custody at a north London police station.
A 20-year-old man held on Saturday has been released on bail until October.
Scotland Yard also revealed Mr Kalikaka-Ekofo had died from a gunshot wound to the head.
A post-mortem examination for the University of West London psychology student took place at Northwick Park Hospital mortuary on Saturday, it said.
A post-mortem examination on Ms Besala is yet to take place.
Detectives earlier launched a fresh appeal for witnesses.
They said there was no evidence to suggest the pair were the intended victims but would be exploring whether anyone else linked to their address could have been a potential target.
Police were called to Elmshurst Crescent by the London Ambulance Service at about 06:25 BST and found the pair in their flat.
Four other people, including a child, were also at the property at the time of the incident but were not harmed.
"All of a sudden the doors would open and there would be masked men with either cudgels or a gun."
[NEXT_CONCEPT]
Troubled doorstep lender Provident Financial has gone from being Tuesday's biggest stock market loser to Wednesday's biggest winner.
[NEXT_CONCEPT]
Police probing the fatal shooting of a mother-of-nine and her nephew at their north London flat have arrested two men.