🚀 go-pugleaf

During my single experience with N2O in college (a nitrous party for
the entire dorm floor) I can remember experiencing a pronounced buzzing
in my ears, roughly coincident with and proportional to the narcotic effect
of the gas.

It's worth mentioning that N2O is not as harmless as it once was thought to be.
It oxidizes the cobalt ion in cobalamin (vitamin B12), producing an inactive
compound, thus depleting the body's stores of this vitamin.  Megaloblastic
changes in the blood can be observed after about 24 hours of exposure
(low-dose nitrous had been used for analgesia), and chronic exposure to
the gas can produce a full-blown megaloblastic anemia and other symptoms
of B12 deficiency.