Quote:
What is the longest anyone has gone w/o food and water, under 'controlled' conditions?
Appears to be 10-14 days, with a range of 1-3 weeks:
Bobby Sands of the Irish Republican Army died after a hunger strike that lasted 66 days. I think he took water, though. I wouldn't believe anyone could last more than two weeks without either food or water.
On the subject of "fire resistance", there seems to be two independent phenomena that are being interchanged. Your body is made up of an awful lot of hydrocarbons and other molecules. Those molecules will undergo certain chemical reactions in the presence of heat. (i.e. they burn) No amount of mind training will prevent those chemical reactions. Enough heat will burn you, yogi or no yogi.
There are also nerves in your body that send signals to your brain that tell you things are getting hot, and you might be in danger. This causes pain, and it also might lead to other physiological reactions, such as increased heart rate or respiration brought on by anxiety or the presence of smoke. Those reactions, and even the perceptions of pain, can to some extent be controlled by training.
So, mind training and placebo effects can change the mind's ability to resist the effects of fire, and control the normally involuntary reactions to feeling the presence of intense heat. However, they can't prevent your skin from burning.
Meanwhile, people don't really understand thermodynamics all that well, and they frequently perceive things to be much more dangerous, or in some cases less dangerous, than they actually are. An object can have a very high temperature, but transfer very little heat, and thus not cause much damage. Stage magicians and yogis take advantage of the audience's perception in order to make it appear that they have special powers that grant them the ability to resist fire, when in reality they just aren't getting all that much heat. The stage magicians understand this phenomenon, and are using it to their advantage, while admitting that it's all fake. Some of the yogis understand this phenomenon, but are being fraudulent anyway. Some of the yogis probably don't understand this phenomenon, and they think that their ability to withstand wet grass on fire but not the touch of red hot metal must be due to the special connection with the energy of the grass's spirit.