A father and son have been warned they face jail for a road rage attack in which they leapt out of their car 'like Batman and Robin'.
Paul Horrocks and his son Phillip were furious when young driver Timothy White overtook them on the road leading up to the Penn Inn roundabout in Newton Abbot.
They exchanged obscene gestures when they pulled up at the lights and all three men got out of their cars.
Horrocks and his son did not know that a Tesco lorry fitted with a dashboard camera was just three cars back in the next lane and it captured what they did as they attacked Mr White.
The jury at Exeter Crown Court took almost six hours to convict Paul Horrocks despite the footage showing him walking straight up to the victim and punching him square in the face.
The CCTV showed the victim had his hands by his sides but Horrocks claimed he was acting in self defence because he thought he was about to be punched or head butted.
He also claimed to be protecting his son's two daughters, aged two and five, who were in the back of the car and said they were vulnerable because the windows were open, even though the footage showed the two on the passenger side were closed.
Horrocks and his family were heading back to their home in Kingskerswell from a pre Christmas shopping trip to Trago Mills when the incident happened at lunchtime on December 23, 2012.
The footage showed Mr White's Nissan overtaking Horrocks' Volvo as they both moved into the same lane. Horrocks did not see the other car beside him and had to swerve back at the last moment.
He then tailgated the car until they ended up bumper to bumper at a red light at the entrance to the roundabout, where they confrontation took place.
Horrified drivers noted the number of Horrocks car and called the police and five of them told the jury how they had seen the assault, in which Mr White suffered cuts and bruises to his face and mouth.
The Tesco lorry footage showed Horrocks starting the assault with a punch and a push which put the victim to the ground and his son kicking him and both men leaning over him.
The attack ended when the lights turned to green and Mr White got up before being shoved back towards his car and driving off.
Miss Janice Eagles, prosecuting, said the way both men opened their car doors and flew out looked 'like Batman and Robin'.
Horrocks, aged 55, of Coles Lane, Kingskerswell, denied causing actual bodily harm but was convicted. His son, aged 27, of the same address, has admitted the same offence.
Recorder Mr Michael Fitton, QC, warned both men they face prison. He said:"You will understand that the nature of this offence means it is likely to be dealt with by an immediate custodial sentence, although I will hear submissions in due course."
He adjourned sentence to next month and ordered probation pre sentence reports on both men.
After the jury returned their majority verdicts he told them that Paul Horrocks has a previous conviction for assault. He said he had not told them of it before their reached their verdicts because it may have distracted them from the evidence.
