You do not get high from breathing pure Oxygen. I do commercial diving for a living and have to breathe daily during DECO. Whoever told you that you get high is utterly and completely full of shit. Moreover, if your paying for it at a bar your wasting your money. I could spend hours typing about the physics of it's positive effects on your body, but getting high or a buzz is NOT one of them. Plus.....how the fuck would you drink O2?.?.?.?