Dragon Ball Z - episode 45 - 24 Apr, 1990

Frieza and his henchmen are already in possession of four Dragon Balls. Frieza has learned of Vegeta's arrival, so he sends one of his henchmen, Cui, after him. Meanwhile, Gohan and Krillin sees two of Frieza's henchmen looking for the Dragon Balls, but they get beaten up easily. Cui believes that he is stronger than Vegeta, but hasn't calculated Vegeta's power after his time on Earth. The two engage in battle, but Cui is destroyed effortlessly. (Source: Wikipedia)