Not only was this scene at Leo Carrillo Beach William Zabka’s first appearance in The Karate Kid (he played Daniel's nemesis, Johnny) but it also was the first scene he shot for the film, and was the first time he appeared on screen in either a movie or TV show.
The Cobra Kai make their entrance in the film at the top of this hill next to lifeguard tower No. 2.
The Cobra Kai pull up on the south side of Leo Carrillo Beach.
"No mercy, man." Elisabeth Shue recalls filming the night scene at Leo Carrillo Beach where Johnny breaks Ali’s radio. "I do remember hitting [Zabka] really hard," she says of the beach confrontation. "I felt like it was all real because I was so new to it ... the way [the Cobra Kai] treated [Daniel] really made me angry, personally, all the time."