When you use a "Cracker" to put nitrous oxide inside a balloon.
You then exhale all of your breath in your lungs & inhale all you can from the ballon, you hold it in until you can't anymore & breathe back into the ballon & repeat until you pass out. Warning: you may think you have died for the "fun" time you are passed out if you are on E or anything, this is very dangerous & should not be done, this is just a definition of what crazy people do.
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