I find really clean MDMA to not be stimulating physically but mentally. What i mean by this is your mind may race, you'll be very alert, awake, attentive, etc.. However, you will not have a desire to move about, dance, run, instead you'll want to sit down, chill out, lie down. Laying down with others on good MDMA is orgasmic! Speedy rolls will make you ansy and anxious if you sit too still and you'll fidget around, doing things like tapping your foot, furiously bouncing your knees, chewing the hell out of your gums, thinking about how awesome a triathlon would be right now, etc..