Ultra Instinct is Goku's powerful state in Dragon Ball Super, first shown during the Tournament of Power arc when he pushes beyond Super Saiyan Blue against Jiren. In this form his body reacts on instinct, his hair turns silver and his aura becomes intense and calm at once. Clips of his roar and transformation spread through anime edits, gaming montages and reaction videos, where the sound became shorthand for unlocking hidden power. It remains popular because it instantly tells viewers a character has reached a new level.