Jack 3D Any of y'all mugs tried the pre-workout supplement Jack 3D (by USP Labs)? I've a buddy (built like a tank) who swears by it, so I'm giving it a try. I've worked up to 1.5 scoops, but am seeing how I do (before going to 2-3). Thus far, I've noticed more energy when lifting. Harnassing energy is tough (in the gym) at times due to long work hours, family demands & being older now (than in my "gym rat" prime). ;-) Let me know if/how y'all might have fared with Jack 3D...thanks.