Haouken (波動拳, hadōken?, "surge fist", a Japanese neologism, literally "wave motion fist") is a fictional special attack that originated in the classic Capcom fighting video game series Street Fighter. The practitioner thrusts his or her palms forward, sending a surge of spirit energy (or ki) flying towards the opponent. It is normally performed by moving the joystick or D-pad a quarter circle forward towards the opponent from the down position, then pressing a punch button; which is usually written in manuals and guides as "↓↘→P" (assuming a right-facing character). It is referred to colloquially as the "Fireball", even though most versions of the Hadouken do not involve the use of fire.