Nitrous oxide Nitrous oxide Nitrous oxide, commonly known as laughing gas or nitrous, is a chemical compound, an oxide of nitrogen with the formula . At room temperature, it is a colourless non-flammable gas, with a slight metallic scent and taste. At elevated temperatures, nitrous oxide is a powerful oxidizer similar to molecular oxygen. It is soluble in water. Nitrous oxide has significant medical uses, especially in surgery and dentistry, for its anaesthetic and pain reducing effects. Its name "laughing gas", coined by Humphry Davy, is due to the euphoric effects upon inhaling it, a property that has led to its recreational
The Laughing Mask (2014 film) Laughing Mask three out of five skulls, saying "in spite of the minor technical missteps and the editing shortcomings, "The Laughing Mask" definitely deserves attention for the inventive melding of classic slashers and cop drama, as well as some brutal and inventive kills." The Laughing Mask (2014 film) The Laughing Mask is a 2014 independent horror film that was written and directed by Michael Aguiar and is his feature film directorial debut. It released on October 31, 2014, and stars John Hardy as a man who must face down the serial killer known only as "Laughing Mask", who murdered John's