Australians are apparently in the midst of an unusual competition. br br For some reason, goading sharks seems to be the new test of antipodean masculinity. br br Earlier this month, a man decided to climb aboard a whale carcass off the coast of Perth, despite the presence of feasting sharks. br br Now, another lunatic thought it would be a laugh to cannonball onto a tiger shark from a boat. br br Doesn’t seem like the smartest thing to do. br br But as his friend filming says: ‘It will only take your arm off’.