He died of asphyxiation from inhaling nitrous oxide. To a lot of people, nitrous oxide seems pretty harmless. You may wonder how dangerous nitrous oxide can be when it comes in whipped cream canisters and when dentists and doctors use it as anesthesia. As a drug, it is most common on college campuses and among older teens. It is also found in commercial cans of whipped cream.
Some people also inhale nitrous oxide from commercial whipped cream containers.
This is generally safe because you're not directly breathing it in. It does not completely block pain, but makes the patient relaxed and causes a floating feeling. Doctors and dentists usually combine it with other gases such as oxygen or local anesthetics. 2 O boosts the horsepower of racecar engines. This can be especially dangerous if they don't breathe fresh air in between, because when someone is breathing in nitrous oxide - they aren't breathing the oxygen they need to survive.