First, Kid Buu front kicks the opponent in their stomach. Then, he roundhouse punches the opponent and punches them again in their stomach. Finally, Kid Buu puts his hand over the opponent's face and blasts them away with a pink energy wave, inflicting a huge amount of damage.
Kid Buu uses this attack during his battle against Super Saiyan 2 Vegeta on the Sacred World of the Kai. Vegeta tries to blast Kid Buu, but Buu avoids the blast by manipulating his body for the attack to pass through. Kid Buu unleashes a powerful barrage of punches and kicks against Vegeta and attacks him with the Nightmare Impact rush, blasting the Saiyan prince into a ditch. Vegeta survives, with a bloody face however, and climbs up to continue the fight.