Oakbank racegoers hurt in gas bottle explosion THREE Oakbank racegoers have been injured when a barbecue gas bottle exploded in the centre of the Adelaide Hills racecourse. The three - a woman, 65, and two men aged 75 and 30 - were treated by ambulance personnel at the scene for burns to their faces and chest. Their injuries were described as not being serious. At least one was taken to the Royal Adelaide Hospital for further treatment. They were among the thousands who have gathered at the racecourse for the annual picnic meeting - the biggest of its kind in the world. Hundreds of people begin the day with breakfasts cooked on portable barbecues.