The violence began after Exeter City were beaten by their rivals Plymouth Argyle in a League Two match on Saturday.
Petrified families watched on as one lonely supporter was battered in the side of the head during a savage brawl sending him to the floor.
In the footage, the man was punched when he was looking in a different direction before he slumped the the ground.
The man then rolled inches away from a motorist who was driving down the road the men were fighting in.
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The man was punched in the side of the head as he fell to the floor
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One man can be heard shouting to the group: “F***ing three people! There's three of you!”
The fight broke out just between Exeter City supporters who had just watched their side be beaten 3-0 by their rivals.
Shocked families look on at the violence as they watched the man being punched.
According to the Plymouth Herald, one woman commented on Facebook saying: “We got caught up in it. Was awful.
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The man was left inches from an oncoming vehicle after being punched
“Throwing pint glasses at the police inside the pub. We had my little nephew with us, didn't finish breakfast, had to leave.
“Awful, don't think they are fans, more like hooligans.”
After the final whistle at the game, some Plymouth fans stormed onto the pitch to take their celebrations nearer the travelling supporters.
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Devon and Cornwall Police have been contacted by Express.co.uk but have not confirmed how many arrests were made on the day.
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