In this high risk activity, an individual purposely cuts off the oxygen supply to his/her brain for a period of time. When done in groups, individuals do this to each other. Temporarily cutting off oxygen from the brain and then allowing blood to rush back to the brain creates a “rush” or “high” feeling. The majority of individuals who participate do not realize the seriousness of the activity and are naively involved because of the “fun” it provides or because of peer pressure. Unfortunately, those involved in this activity face great risk for brain damage, stroke, seizures, and even death. Risk of accidental strangulation is particularly high for individuals doing this activity alone while using ropes, cords, belts, etc. to induce the experience.