This was the second dose I tried - after the A-bomb which completely rocked my world. It started out super mellow, and built up, and near the end I went through periods where I was aware my body was shaking and convulsing...I don't know how else to describe it. After ending, I went to my desk, did some emails, and my legs were bouncing up and down with energy. Headed to the gym, cranked out 45 minutes of easy cardio with super high energy. Can't wait to give it another try.