While riding an Armadillo Roller, using Rolling Boost activates Roll Mode. While Rolling, traveling downward increases your speed and traveling upward decreases your speed. As you increase in speed, it becomes harder to turn. Roll Mode lasts until you slow to a stop or until manually canceled.
You also gain access to the following abilities:
Rolling Boost
Boost forward and activate Roll Mode. Empowering grants a larger boost.
Rev Engines
Boost forward, activating Roll Mode.
Impulsive Leap
Defy gravity, converting stored momentum into a leap upward. Activating again in mid-air activates Glide Mode.