Does laughing gas from Batman exist?

Laughing gas, also known as nitrous oxide, is a real substance that has been used as an anesthetic and pain reliever since the 1800s. However, the idea of a villain using laughing gas as a weapon in the manner depicted in the Batman comics and movies is purely fictional. The effects of laughing gas typically wear off within minutes, and it does not cause uncontrollable laughter or madness.