La Force totale

Frieza reveals that Namek is set to explode in 5 minutes, as Gohan finds Bulma and gets back to the ship. Frieza decides to power up to 100% of his maximum to finish the fight. Instead of stopping him, Goku has let Frieza go full power, with the idea that if he beats Frieza at his full power, he will never fight him again, and also because he wants to take down Frieza at his best to fully avenge Krillin. As they continue their fight, it seems that Frieza has regained the upper hand now that he has powered up to his maximum, but Goku claims that the battle is far from over. (Source: Wikipedia)