UPDATE: THE two young men who taped footage of an erratic driver said they were amazed no one was hurt after viewing the dash cam video.
Shae Guivarra,18, and Chris Larsen, 17, said the saw the footage after collecting if from the Bundaberg Police.
"We didn't realise he almost crashed so many times," Chris said.
"I'm glad we followed him and called the police."
Shae said the experience was prepping him for a future with the Queensland Ambulance Service.
"In January I start my cadetship as a paramedic here in Bundaberg," Shae said.
"I want to help people and after seeing this guy driving this way I had to follow him to make sure he didn't hit anyone.
"That could have happened and it could have ended real bad."
He said he had only installed the dash cam a few weeks ago and was glad he could assist the police.
EARLIER: TWO young men who saw a driver swerving across the road and running over median strips on Sunday night said they feared for innocent bystanders.
Shae Guivarra,18, and Chris Larsen, 17, said they noticed the car driving erratically near Hungry Jacks and started to follow it while calling police.
"He was swerving everywhere so we thought it best to follow him," Shae said.
"There was a car in front of him who had to stop so the driver didn't hit him.
"We followed him past the Hinkler statue and he stalled - that's when we phoned the police.
"On Bourbong St he stopped and someone got out of the car and pulled him out and told him not to drive again and moments later he was back in the car and driving."
The witnesses said the driver then drove down Targo St and collected a number of vehicles.
He then side swiped a number of barriers and crashed into one which stopped him from plummeting in to a storm water drain.
"He hit the rail and probably s*** himself and knocked his bearings out before hitting the other side and going half way through it," Shae said.
"The person in the passenger seat got out and took off."
A Bundaberg Police spokesman confirmed the matter was under investigation and police had been provided with dash cam footage from a motorist who witnessed the incident.
A Bundaberg man in his 30s was taken to Bundaberg Hospital and provided a blood specimen sample.
Police are still waiting for the results of the test. No one has been charged at this stage.