Faster than running while crouched

Sometimes when you go prone and swap to crouch fast enough you will be crouched and run as if you put on a 2x run, when this happens he sound you make stays at crouch level.

Crouch Run Glitch

If you aim down your sights with any weapon and double tap B then un aim after the second tap you will have the abilty to crouch run. Works 99.99% of the time!