Took an ECA stack this morning, about an hour later I was shopping at the PX and saw Hot Rocks for $27.00 so I decided to try it again(The last time was just a sample and I didnt feel a thing). Took 2 right away, washing it down with GNC'S Nitro powder (That's SuperCharge/SuperPump for broke mother fuckers like myself). I think I lost 2lbs in sweat while sitting down watching a movie in a cold theatre over the next 3 hrs. Anybody else get results from mix-n-matching like this?