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
Green tea ice cream gradually helped people learn about green tea, resulting in green tea ice cream becoming a typical dessert. In those days, there were two different kinds of green tea ice cream served at restaurants. One was made by mixing dissolved matcha powder into vanilla ice cream in a restaurant’s kitchen, while the other was made by a local ice cream manufacturer who did not know the proper way to make the dessert. In the first method, ice cream had to be melted once and refrozen when they mixed in the dissolved matcha powder, resulting in the ice cream having an undesired