User blog comment:PlantyThePottedPlant/Random Topic Blogging II: Electric Blogaloo/@comment-25533515-20120402140452/@comment-5151799-20120402225129

From Wikipedia:

"The fainting game (also known as the choking game and a wide variety of local slang names), refers to intentionally cutting off oxygen to the brain with the goal of inducing temporary syncope and euphoria. There are two distinct methods used to achieve oxygen deprivation: strangulation and self-induced hypocapnia."

Sounds like good, wholesome family fun.