The Gekiretsu Madan 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 yellow barrage of energy blasts 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, 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.
The attack was named in the Budokai Tenkaichi series and is one of Kid Gohan's Blast 2 attacks. Teen Gohan can also the attack in his base and Super Saiyan 2 forms. It reappeared in Dragon Ball: Raging Blast, where it is renamed "Energy Blast Barrage." and is added in Teen Gohan's moveset in his Super Saiyan form.
Future Gohan is shown to use an energy sphere version of the Gekiretsu Madan in his Super Saiyan form. He has this as one of his Blast 2 attacks in Dragon Ball Z: Budokai Tenkaichi 3. Instead of firing rapid energy blasts, Future Gohan draws his hand back to his side and charges a yellow energy sphere. Then, he brings his hand forward and fires the attack at the opponent, inflicting a great amount of damage.