Settling pub arguments about who's strongest since roughly forever, and Stallone even made a whole film about it.
Fun fact: Spiral fractures of the upper arm are so common in the sport they have their own medical name.
Canadians invented it in the seventies because apparently even tetraplegia wasn't going to stop them hitting each other.
Fun fact: Originally called murderball, it was invented in Winnipeg in 1976 by five athletes with tetraplegia.