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
Winter ice cream Winter ice cream Winter ice cream ( or ' ) is a Hungarian confectionary similar in appearance to ice cream in a cone, but traditionally having ganache or a similar kind of sweet cream filling with usually a chocolate-cocoa flavoring. It gained popularity in the 1970s in communist Hungary, being produced as a winter alternative to "summer" ice creams, which were deemed to be too cold for winter sweets. Apart from grocery shops, it was frequently sold as part of the national railway's catering service ('). The confectionary's popularity faded in the early 1990s, when, after the end of communism,