"In 1985, the meditation team made a video of monks drying cold, wet sheets with body heat. They also documented monks spending a winter night on a rocky ledge 15,000 feet high in the Himalayas. The sleep-out took place in February on the night of the winter full moon when temperatures reached zero degrees F. Wearing only woolen or cotton shawls, the monks promptly fell asleep on the rocky ledge, They did not huddle together and the video shows no evidence of shivering. They slept until dawn then walked back to their monastery."
Viz: http://news.harvard.edu/gazette/2002/04.18/09-tummo.html
Takže nakonec se jim to snad i povedlo navodit v laboratorních podmínkách. V dokumentu, který jsem viděl, se jim to ještě nepovedlo.