Insane scene at an independent wrestling event in Georgia over the weekend ... a star wrestler was headbutted by a fan -- and the blow was so violent, it ignited a brawl at the venue.
It all went down at the IWE Pro-wrestling show in Augusta on Saturday night ... when independent wrestling star Joe Black was making his way to the ring for his match.
Black appeared to have had a quick, quirky interaction with a fan -- seemingly trying to knock something out of the man's hands -- and then, suddenly, the guy lunged at Black with the crown of his head.