IT gets called 'biff' these days, when rugby league matches get a little over heated.
Here's some of those kind of incidents in our latest 'Bunch of 5s' collection of pictures.
1.
Warrington Wolves v Cronulla Sharks in 1997. Picture: Mike Boden
2.
Wire away to Castleford in 2006. Picture: Mike Boden
3.
One from the 1972/73 season, possibly against St Helens?
> More pictures from our 'Bunch of 5s' series
4.
In they go as bodies are flying. Picture: Mike Boden
5.
First fight at The Halliwell Jones Stadium in 2004? Picture: Mike Boden
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