Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
A Buddhist monk had himself placed in a freezing cold room under the surveillance of scientists in Normandy, France to prove the power of meditation. What occurred astonished people around the world.
The monk was covered in a wet blanket, and during his meditation session produced so much body heat that the blanket was dry by the end. Death could easily result from being drenching in a freezing room, but through the use of meditation called Tum-mo they are protected.
Buddhists believe that the reality we exist in is not the ultimate one, and only through meditation and doing good can they achieve this ultimate reality. The heat they generate is just a byproduct of Tum-mo meditation, and to this day scientists are still not exactly sure why this happens!