Take a look at this video about meditating:
name: Ram Bahadur Bomjon. Discovery Channel produced a documentary titled “The Boy With Divine Powers”. the film crew was able to film Ram continuously for 96 hours, day and night, during which time he did not drink any fluids or eat any food. According to scientists on the documentary, an average person would be expected to die from kidney failure after 4 days without drinking any fluids. The boy showed no signs of classical physical deterioration caused by dehydration. At a close inspection conducted by the filming crew around the tree where Ram was sitting, no hidden water pipes or food stashes were found. wikipedia : en.wikipedia.org
