Episode 48 — Dragon Ball Z

After witnessing Cargo's death, Gohan cannot stand by any longer. [2] Overcome by rage, he kicks Dodoria away just as he is about to kill Dende. [25]

To Frieza's surprise, three Namekian warriors appear. [2, 11] Unlike the villagers, they have power levels of around 3,000—enough to easily defeat Frieza’s lower-level soldiers. [11] Dragon Ball Z Episode 48

Watching from a distance, Gohan and Krillin are paralyzed by Frieza’s overwhelming and "evil" energy. [3, 7] They know that revealing themselves would mean certain death. After witnessing Cargo's death, Gohan cannot stand by