There's - or there used to be - a Sports Day activity that was 'throwing the cricket ball'. It used to be a junior bit of putting the shot and javelin hurling and is quite close. The carved stone balls could have been usefully chucked competitively, though none are chipped from landing on a another stone. The reality TV endurance shows are a trial of some kind of strength. Tossing the caber might always have been a chucking a tree trunk competition.