If you use that much Red Bull, you got 2 issues (at least): the sugar gives a rush, but the bloodsugar level will plunge. And each time you continue it plunges even harder and faster. Second, Red Bull or any caffinated beverage will attack your adrenal gland badly. Realy hard. Your adrenal gland is responsible for your adrenaline (duh) and gets triggered by the caffeine. So, it's not the caffeine that gives you a boo…
You could set up a test where you drank a pot of coffee and then did something insane, I assure you that you will still feel the effects of the adrenaline kick from the insanity.