Dragon Ball Z - episode 66 - 06 Nov, 1990

Goku has finally arrived on Namek, and finds Krillin, Gohan and Vegeta near death. He gives them all a Senzu bean, and prepares to fight the Ginyu Force. With a single blow to the gut, he puts Recoome out of commission. Goku's training at 100x normal gravity has exponentially increased his strength. (Source: Wikipedia)