Dragon Ball Manga Vol.4 Chapter 48: Son Goku's Monkey Imitation
Summary
As the fight between Gokū and Jackie Chun continues, Chun decides to use a double afterimage attack to trick Gokū and send him flying towards the wall. However, when the host announcer begins to count, Gokū immediately jumps up and mimics Chun's attack with his own variation using a triple afterimage sequence, confusing Chun.
While Chun almost reveals himself as Rōshi to Gokū, Chun decides to fight Gokū with Drunken Fist style , with Chun concluding that Gokū could not imitate the technique because Gokū had never gotten drunk before. As Gokū acknowledges that his grandfather was also skilled in using this technique, the young boy finds himself frustrated by Chun's attacks. Gokū then decides to defend himself with his own dog style and Chun flies towards the wall. Chun is then frustrated that Gokū continues to block his attacks.
