The ingenious bamboo trains of Battambang - these one-carriage 'trains' are assembled in less than 30 seconds from a bamboo platform balanced precariously on steel wheels scavenged from abandoned army tanks. The whole contraption is driven along the twisted and poorly maintained railway track by means of a simple diesel engine. Whenever two bamboo trains hurtle towards each other on deadly collision course, the drivers play a version of 'ching-chong-cha' or 'scissors, paper, rock' to determine who has to dismount from the track to make way. The rickety trains reach speeds of up to a hair-raising 100km/h.