A wedding ceremony turns into tragedy as cement truck filled with full cargo of bags rolled backwards into the wedding party killing 17 guests and injuring 12 others earlier this week. The driver was apparently repairing the truck when it overran wooden chocks placed behind its wheels and slid 20m down a slight hill into the reception, which was being held in a house close to the road in the central Javanese town of Ambarawa, some 400km east of Jakarta.  Trucks are poorly maintained in Indonesia and traffic accidents are common on its crowded highways.