theres a cool breathing trick you can do and you'll get the feeling of nitrous oxide. if you wanna try......
hypervenalate kneeling down with you face torwards the ground for about 30 seconds then the last breath inhale while standing up quick and tilting your head back, pluging your nose, and it helps to close your eyes.
I did this in the shower and fell because i was so out of it, not a good idea haha. thats why i hold on to the railing now..........haha
I think it works because there is nitrous oxide already in your body something like that. Not many people know about it though. Thats how we got high in juvie haha