This is the golden rule.

Here is the text you requested, written as if it were a description or a forum post about such a trainer:

Bullets whizzed past. He didn't flinch. He walked through the hailstorm, feeling the phantom buzz of impacts that never landed. It was hilarious. Liberating. He cranked Super Speed and zoomed between guards like a blur, knifing them before they could blink. Infinite Ammo turned his M16 into a fire hose of lead.

Increases the player's movement speed for faster traversal of maps. How to Use the Trainer Safely