The Barrel Roll is a self-launch that any person can do when playing Grifball Dash. To execute it, the runner must evade immediately after picking up the ball.
The Barrel Roll can only be done in Grifball Dash. In Dash, the bomb carrier is at 120% speed, so the Barrel Roll carries him less than half the court. In Grifball Evolved, however, the bomb carrier is at 150% and the ability to use Armor Abilities when carrying the bomb is turned off.
Check out the video below to find out how to do the Barrel Roll, and even how to do the Double Barrel Roll!