A father and son were so shocked by drivers attempting to overtake a tractor badly that they decided to catch it all on film.
Carl Mahoney was driving in Wales with his son, when they both watched a number of 4x4s trying to overtake the farm vehicle.
The footage shows a Range Rover pulling out into oncoming traffic twice as it tries to pass.
Mr Mahoney’s 14-year-old son who filmed the footage on a mobile phone couldn’t believe what he was seeing as is made clear in his startled response.
He said: "Here we go ’Mr Smartmobile’ is about to pull out. Look at him... What is wrong with you, muppets?
"I am 14 and I can probably drive better than you, you melts. Are you mad? Are you being serious? Are you mad? Are you honestly stupid?
"Look Jesus, bunch of dribbles. Look at them all. Why can’t people just be patient? Look... and he expects you to let him back in."
At one point the footage shows three vehicles blocking the road as oncoming traffic travels towards them.
Mr Mahoney posted the footage on Youtube.
He told the Daily Post: "On my way home these guys just pulled out in front of me.
"Excuse my son’s commentary and just for the record at the end of the road there was a junction where the tractor turned right and I turned left."
Lynne Barrie, Chairman of the Approved Driving Instructors National Joint Council said: "It shows awful driving and decisions.
"Basically rural roads are the place most fatalities occur. They are not only endangering themselves but others.
"I can completely understand the commentary. I am horrified by the amount of space people are keeping, if that was me I would want to keep back.
The footage follows calls from a journalist to ban tractors from a main road in Wales.