Really good high, you feel very euphoric. No worry running through you at all, just utterly cool.. disconnected, disassociated in a sense but still capable of being sociable.
One thing that I remember from using it, and this was as a teenager, is you have like no concept of time on it... I remember using it in this building's alley with some friends, and we must've just been standing in the same place for over 20-30 minutes because somebody called the cops on us... we had nothing on us by that time but they knew we were gone out of our minds, so they just told us to get lost...