Gekiretsu Madan (激烈魔弾) is a rapid-fired version of the Masenko used by Gohan. First, Gohan raises his hands up to his sides and charges a yellow energy sphere in each hand. Then, he puts his hands forward and fires a barrage of yellow energy waves against the opponent, inflicting a massive amount of damage.
Gohan used this attack during the battle against Frieza in his second form. After witnessing Frieza's brutal attack on his friend, Krillin, Gohan's rage exploded and he attacked Frieza with a barrage of punches and kicks, then fired a powerful charged ki blast at Frieza which he quickly blocked, then opened his eyes and Gohan smacked a blast into Frieza's face, knocking the tyrant down to the ground. Gohan then blasted Frieza with the Gekiretsu Madan, creating a mass dome of energy where Frieza was laying. Gohan then fired his Masendan down at the energy dome, causing it to explode and injuring Frieza quite a bit.
Gekiretsu Madan was named in the Budokai Tenkaichi series, where it is one of Kid Gohan's Blast 2 attacks. In those video games, Teen Gohan also uses this attack in his base and Super Saiyan 2 forms. It is named Energy Blast Barrage in Dragon Ball Z: Attack of the Saiyans, the Raging Blast series, and Dragon Ball Z: Ultimate Tenkaichi, and Full Power Consecutive Ki Blast in Dragon Ball Z: Infinite World. It the Raging Blast series, the move is added in Teen Gohan's moveset in his Super Saiyan forms. Future Gohan uses an energy sphere version of the Gekiretsu Madan in his Super Saiyan form as one of his Blast 2 attacks in Dragon Ball Z: Budokai Tenkaichi 3; Future Gohan's version is called "Hyper Masenko" in Dragon Ball: Raging Blast 2.