How Cold is Cold???

Liquid Nitrogen is -196 Centigrade, -320 Fahrenheit. Your skin is about 99 Fahrenheit. So we have about a 420 degree difference between skin and LN2. Now, LN2 IS dangerous, it is used to basically freeze off warts, moles, etc. It burns. However, it actually takes longer than you think to do this. Essentially, to burn the skin you have to drain the energy (heat) out of the it using LN2. A splash of LN2 is on your skin for just a fraction of a second, in that time, very little energy was actually lost and the LN2 has basically flashed off, so you need more LN2 to cool the skin. Couple this with the layer of oil that is on your skin that the LN2 has to cool down and/or move first, and you'd be amazed at how you can pull a dollar bill out of a container of LN2 with your bare hands never even getting wet?