In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
Hot water can freeze faster than cold water.
181
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
31
You can immediately cool down a car that has been sitting under the sun by rolling down the window on one side and opening-closing the door on the other side 5-6 times.
23