Im sure you could have felt something brutha, anytime you introduce anything into your body especially via injection, you can feel it in there. Now thats obviously not the HGH doing its thing in terms of the ultimate reason your using it for. But sure, i have felt the first injection of new cycles running through my entire body, and yeah warm is a very accurate way to describe it. So no i wouldnt call it placebo, nor would I say its kicked in or anything like that but no your not crazy lol