it wasn't bad at all. actually, it was as painless as the delts. i was nervous because of all the bros saying that the biceps are killer. but i barely felt it at all. i did 1cc of enanthate. this summer, when i run prop and fina, im sure it will involve a little more pain. but for now, nothing. maybe tommorow it will be a little worse. but it can't be as bad as when i tried a calf injection (ouch!)