Kuuenbu

Kuuenbu or Kūenbu (空円舞? lit. "Air Waltz"), is one of the two special techniques that Zero learns after defeating Split Mushroom in Mega Man X4. This technique allows Zero to jump a second time in midair -- by pressing the Jump button a second time -- allowing him to jump even higher to gain access to otherwise out-of-reach areas (provided that the player does not dash-jump beforehand).