If you want to lift heavier and be more "intense" in the gym, just take a protein shake with creatine 20-30 minutes before workout, you'll feel you can lift heavier
It is very dangerous to do. I saw a show on it
and they did it to cops to make a fake crime scene
and test how adrenaline works. I remember they said
that it is very, very dangerous to do. They had medical
care there incase something went wrong