Nitrous oxide or N2O, is known not only as a boost for the engine in need for speed games (in fact, everything is not as bright as in the game, and nitrous oxide does not give much acceleration, but only improves the technical operation of the internal combustion engine), but also also known as laughing gas due to its intoxicating effect when inhaled. It is widely used in anesthesia, but not in pure form, but diluted with oxygen and other substances. Without oxygen (less than 20% oxygen in the mixture) and at high concentrations, it can lead to loss of consciousness and asphyxiation (suffocation), so this is a very dangerous entertainment.
Let me clarify: "nitrous oxide" in the sense of NO2? If yes, then NO2 is the strongest oxidizing agent, even a small amount of it can lead to death. Well, a significant amount will dissolve your corpse, and even buttons on your clothes. Or do you mean some other substance?
I haven't tried it. The guys at DrugsLab tried it. I think long descriptions of effects from the encyclopedia will not do much, so here is a first-hand video (there are Russian subtitles there).