I've done it, but not while I was peaking on the MDMA. I've done it on the comedown so that I'm not as tired if I'm in a spot where I have to be up such as school or a dance or party. When I'm coming down, my mind is tired but my body is up and about. When I do ritalin on the comedown, it SWITCHES it around. My mind becomes awake but my body gets tired lol