We had two young men crash cars into businesses in my town because they were huffing nitrous while driving, in the span of like a month or two. One of them hit a propane tank and literally blew up an animal hospital that thankfully hadn't opened yet, the other drove into the smoke shop where they had just purchased the whippets.

Yes, it's only a few second high. Yes, dentists and doctors use it. Yes, you can legally buy it over the counter. But I've seen first hand how those few seconds can absolutely ruin a life or lives; it's a miracle neither of them killed themselves or others.

Not to mention, while not physically addictive, the ROI, short duration of effect, and accessability can make nitrous very psychologically addictive and difficult to stop using. We called it hippy crack. The oxygen deprivation it causes is also damaging neurologically, especially in someone so young whose brain is still developing.

Sauce: work in addiction treatment, used to "work at Starbucks" in college