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
Bacon ice cream sweet food, eaten as a dessert, even though there is evidence of savoury ice creams eaten in Victorian times. Bacon ice cream originated as a joke, a flavour that no one would willingly eat, in the 1973 "Ice Cream Parlour Sketch" by "The Two Ronnies", where a customer requests cheese and onion flavoured ice cream followed by smokey bacon. Bacon-and-egg ice cream was eventually created as an April Fools' Day experiment at Aldrich's Beef and Ice Cream Parlor in Fredonia, New York. In 1982, co-owner Scott Aldrich was challenged by a gravy salesman to make gravy ice cream, which he