An idiotic trail bike rider was filmed doing a wheelie on the M1 Princes Motorway - at around 110km/h.
To compound matters, the rider wasn't wearing a helmet.
The startling footage was captured by a driver on motorway at Kanahooka at 1.45pm on Thursday.
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He said the two trail bike riders came down the on ramp from Kanahooka Road - neither bike showing any licence plates but one rider was wearing a helmet.
Even before the rider reached the motorway, he reared up on his back wheel.
The helmetless rider stayed that way for almost two kilometres and only put the front wheel down when he reached the Kembla Grange off-ramp.
The person filming the antics included footage of their car's speedometer, showing the trail bike rider reached speeds of up to 115km/h.
The frightening footage comes on the back of several recent fatalities involving trail bike riders.
Earlier this month, 18-year-old Phoenix Quinn died in Lake Heights after crashing into a parked car and being thrown over its roof before crashing into the windscreen of another car behind it.
In May, 16-year-old Dejah Stewart was a pillion passenger on the back of a trail bike when the teenage male rider collided head-on with a car and the bike then "exploded", according to witnesses.
She later died in hospital and the male rider was charged over her death.
In 2017 19-year-old Shane Puckeridge died when his trail bike crashed into the back of a parked ute at Blackbutt.
For the last two years Lake Illawarra Police District has been focusing on illegal riding of trail bikes and Acting Superintendent Dan Richardson was not impressed with the wheelie rider's antics.
"We have seen a number of young people lose their lives on trail bikes in recent months, and it's really concerning to hear about behaviour and to see footage such as this, where the rider obviously has a complete disregard for the safety of themselves and others around them," Acting Superintendent Richardson said.
"This kind of behaviour will continue to be a focus for police. We don't want to see any more young lives lost on our roads."
"Our trail bike squad will be out in force over the summer months, and will continue to investigate and take legal action against those who choose to do the wrong thing on our roads and in our parklands."
Anyone with information about illegal trail bike riding can call Crime Stoppers on 1800 333 000.
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