After I left the dentist office, loaded on nitrous oxide, I felt that this is the buddha-like state that people are more or less trying to work up to. And it was achieved in five minutes and the feeling of peace lasted the whole day. It was as good as any meditation I have ever done.
Nitrous. I remember those days. I only had that when I was under 12 years old. He called it the "space ride". The amazing thing is it wears off in no time. At least that stuff did, don't know what it is now. Back then the cavity filling method was crude, over-drilling out good teeth to make a fill.
I would say that particular feeling from nitrous, to me, if I remember correctly, is kind of a similar energy feeling, but more external, outside. Been a long time.