'It's an educated risk': Chayne Hultgren (a.k.a. 'The Space Cowboy'), re-enacts his 18-sword swallowing attempt for a Guinness World Record in front of the Sydney Opera House     'I'm really happy': The Space Cowboy shows off his Guinness World Records medal - and the 18 swords   Not recommended by doctors: Chayne has taken his life in his, er, hands - but passers-by behind him appear rather unconcerned   An Australian man has set a world record by swallowing eighteen swords in one jaw-dropping gulp.   Chayne Hultgren - who calls