No matter what anyone tells you it can kill, it will cause a cerebral hemorrhage in the brain, back in college i sucked down a few balloons and it does give you a short little high, but its not all that, The problem these days is kids are getting these really big balloons and doing them one after another through out the night. The big thing with doing balloons is phishing out, what happens is all the air to the brain is cut off and the person passes out and shakes, what kids get out of that i cant imagine. It is the same as the nitrous that you get at the dentist, but at the dentist it will be a mix of 75% oxygen and 25% nitrous. These kids are breathing in 100% nitrous, what they do before they fill the bottle with nitrous is pour in a can of whatever flavor juice concentrate so the air has a taste. Its dangerous stuff.