Van olyanféle "gáz" amitől az emberek csak úgy elkezdenek nevetni?

[link]

"Scientist Humphrey Davy introduced nitrous oxide to the public (primarily the British upper class) as a recreational drug at "laughing gas parties" in 1799, 36 years before it was used medically. The gas does NOT make one laugh; in fact, it makes the user feel stuperous, dreamy, and sedated. Davy called it "laughing gas" because at his parties, everyone laughed and had a good time watching the user's "nitrous oxide capers", which included stumbling around, slurred speech, and falling down."

http://www.youtube.com/watch?v=sZbJohQpPsc

Ezt érdemes megnézni :D