Hi, MagicRunner. That's a good question. Obviously, experiencing anything that is perceived to place the body in danger causes an adrenaline rush. As mentioned in the article, it’s a fight-or-flight response, so the body believes it is reacting in order to survive.
But a blast of adrenaline can be triggered in other, less terrifying ways, as well.
I’m a believer in “mind over body,” so visualization can be used. Try visualizing a moment in your past when you were terrified or felt you were in danger. Better yet, think of a moment when you were extremely angry. These may sound like negative ways to achieve a good rush, but it does work when you are looking to get “psyched up.”