The prisoners during the death march were driven to the point of death, and beyond. The most prominent form of torture that the Japanese used was something called the sun treatment, where all the prisoners stood in a line in the blazing sun, without any protection for hours. Prisoners were denied food and water all the time, and some survived for a week on a ball of infested rice the size of golf balls. The weight of most of the prisoners dropped to around 100, until they were skeletons. Those that tried to get water from water sources were bayoneted or shot. Marches would go for sometimes 16 hours straight. Also the Japanese might switch the paces by going very fast or very slow, killing all the prisoners slowly.