Liquid nitrogen evaporates, and can cause violent oxidation of organic material. Ingestion of liquid nitrogen can cause severe internal damage, due to freezing of the tissues which come in contact with it and to the volume of gaseous nitrogen evolved as the liquid is warmed by body heat. In 1997, a physics student demonstrating the Leidenfrost effect by holding liquid nitrogen in his mouth accidentally swallowed the substance, resulting in near-fatal injuries. This was apparently the first case in medical literature of liquid nitrogen ingestion. In 2012, a young woman in England had her stomach removed after ingesting a cocktail made with
It's-It Ice Cream McDow and Isa Zaru, bought the It's-It name. They mechanized production, first at a facility on 11th Street in downtown San Francisco, moving to the current factory in Burlingame in 1976. The company's products are now sold in supermarkets and convenience stores. Chocolate, strawberry, mint and cappuccino flavors were added in the 1980s and green tea in 2016; pumpkin is also available. The company has also added other ice cream products, including the "Super Sundae", the "Big Daddy", the "Super Cone", and the "Chips It". It's-It Ice Cream It's-It Ice Cream is an ice cream manufacturer and distributor based in