Former France back row Sebastien Chabal has traded on his caveman-like looks over the years, becoming one of his country's most popular sportsmen in the process.

But the 36-year-old did something pretty neanderthal during a game in France's second tier D2.

The Lyon player punched Agen’s Marc Giraud at the end of a ruck, knocking his opponent out cold. Giraud had to be stretchered off following the altercation.

Chabal got away with a yellow card but he is likely to be given a lengthy ban when the disciplinary committee review the footage.