The world is increasingly becoming a more military place, it feels like we have entered a new modified cold war filled with groups who have no country and no flag. In the past couple of years it is has become clear that the strongest armies in the world are not the ones with the largest number of guns.
Skin slip occurs in dead bodies and is a natural part of the decomposition process. Over time (from the minute a person dies), their skin begins to loosen. This loosened upper layer of skin will often get large blisters that fill with oedema (edema I guess outside of European English? - basically it's bodily fluids, mostly water).
Freezing skin lesions with liquid nitrogen is often a good way to treat growths in the epidermis, the outer living layer of skin. It is routine for warts, actinic keratoses, seborrheic keratoses, and skin tags. It does not treat things below the epidermis such as moles. It is not adequate treatment for skin cancers. The air you are breathing right now is 78.1% nitrogen. In 1895, a process was developed for chilling pressurized air so extremely that it turned to liquid. The liquid nitrogen component of liquefied air measures minus 196Â°C.