The command originates from the 1997 Nintendo 64 game . In the game, a veteran pilot named Peppy Hare (voiced by Rick May) instructs the protagonist, Fox McCloud, to "do a barrel roll!" as a defensive maneuver to deflect enemy laser fire. Did you know? Game Theory: Star Fox, Do a Barrel Roll
If you want to see it in action, click here or go to Google and type it in yourself. do barell roll