Never had an energy shot or even an energy drink before. I'm super sensitive to that kind of thing. Took a caffeine pill once in high school, and had to go to the nurses office and lay down for the rest of the day. By comparison, I could drink 2-liters of Mountain Dew in one sitting, years later and be fine. Now I can't even drink 1-liter of it in a 4 hour period, without getting the shakes. Shit is messed up.