Balls to the walls

[Becky]

Term used to describe an intense, or extreme situation.
Origin: In aviation, the throttles (or power levers) are usually sticks with ball shaped ends. When a pilot wants full power, he moves the throttle forward towards the front wall of the cockpit. Thus, balls to the walls meant full power.

[Rihanna]

When you take a risk, or doing something that you normally would be not inclined to do; doing something dangerous some may see as foolish or crazy; just doing it