The Inteligent Ibis

Well, today I feel like going Super Saiyan. What I don't understand is the specific type of rage, or other emotional response to trigger one's body to change in such a dramatic fashion. My reasoning is that the adrenaline must go near infinite for however long the subject chooses. The only thing I see that's wrong with this scenario is why one doesn't experience life threatening fatigue when one leaves such a state. The only explanation that can explain such happenings is that Saiyans get stronger if they don't die after such large beatings. Wow, I've got to become a Super Saiyan.