The train guard with NSW Trainlink, said he was thankful that after nearly 10 years on the job, he hadn't yet witnessed a fatality while driving a train.

"That said, I've had a couple of near misses both me watching the train on the platform and the driver coming close to cleaning someone up," the guard, who did not want to be identified, said.

"The dangerous behaviour and games of chicken are something I see nearly everyday and it's usually drunken idiots or school kids," he said. "I'm sick to the back teeth of it.

"What you find funny about taking a chance with death or pretending to push someone while a train is arriving, departing or passing through a station is completely beyond me."

The driver said he had watched work mates, his colleagues, dealing with the aftermath and it was devastating.

"It affects people differently and a lot struggle to cope with it or come to terms with it.

"Luckily the crew support each other at work but it has the potential of ruining someone's life or career," he said.

"It's not rocket science but the result affects a number of people from the driver and guard, to the emergency services, the person involved's family and the passengers and witnesses."

The driver said that most recently he watched a colleague deal with a horrible incident only last weekend.

"The most recent was only last weekend. The stories drivers and guards could tell you would be near horror movie gruesome."

The train driver in Friday afternoon's fatality was counselled after a man was pulled under his train as it came into Fairy Meadow station just before peak hour.

The man, believed to be aged between 35 and 45, was hit by a train and killed just before peak hour, throwing the start of the long weekend into chaos for commuters.

Police are treating it as "misadventure".

Some 300 passengers were evacuated from the train while emergency crews investigated the cause of the incident and dealt with the carnage