- SpongeBob SquarePants
- Sandy Cheeks
- Eugene H. Krabs
- Squidward Tentacles
- Customers at Krusty Krab
- Fred Rechid (Three cameos, One in deleted scene)
- Nathiel (cameo)
SpongeBob and Sandy are practicing karate against each other. SpongeBob is carefully going around his house looking for her, until she jumps out. They fight, and have lots of fun. Sandy tells him that she will sneak up on him and fight him tomorrow. At the Krusty Krabthe next day, SpongeBob thinks anyone or anything can be Sandy, so he is cautious and does not work much. When he strikes one of the customers, Mr. Krabs demands to know what is going on, so SpongeBob explains to him that he is doing karate.Therefore, Mr. Krabs tells him to stop doing karate, or he will be fired. Sandy attacks him, and thoughSpongeBob attempts to explain Mr. Krabs's warning, Sandy refuses to listen. At that moment, Mr. Krabs comes out of the Krusty Krab and thinks he is doing karate with Sandy and then promptly fires SpongeBob (even though he was just standing there and doing nothing). Sandy quickly explains to him that SpongeBob tried to tell her, but she just refused to listen, and he gives him his job back.
The two attempt to forget about karate, and go to the park. However, while slicing sandwiches, they begin doing karate again, Mr. Krabs catches them. However, he finds that karate chops can replace knives, and has SpongeBob and Sandy slice Krabby Patties this way, earning him more money.
- Kah Rah Tay is a game based on this episode on Nick.com.
- 11th time Patrick dosen't appear.
- On The Complete 1st Season DVD, this episode, along with "Plankton!," has a cast commentary.
- This is the final episode to premiere in 1999. It is also the last episode of the 90's. The next episode, Sleepy Time, will premiere in 2000.
- There is a fish fishing for fish with a fishing pole at the Bikini Bottom Park.
- When SpongeBob attacks Fred and sends him into the floor, some fish are shocked. One of the fish (who is gray with something purple on his face) is the fish that acts confused when he hears Plankton's squeaky voice in Walking Small.
- The face on the hot sauce drop is Tom Kenny's face.
- A clip of this episode can be seen in the 2010 film Date Night.
- SpongeBob went into the bathroom and thought he heard Sandy, but SpongeBob went into the men's room, so Sandy could not have been in there.
- In this episode SpongeBob is good karate master like Sandy, but in other episodes Sandy is much better.
- Throughout this whole episode, Sandy has three dots on her patch instead of an acorn.
- This is the first time we see the Bikini Bottom park. 2nd will be on Life of Crime.
- "MY LEG!" has become a popular Internet meme.
- This episode include a rare instance in which SpongeBob defeats Sandy in a karate fight.
- The title card is the same as "Sandy's Rocket."
- The mask that Sandy says is her "worst disguise yet" looks similar to the one that SpongeBob wears when he pretends to be Sandy's "pappy" in "Sandy, SpongeBob, and the Worm."
- This marks the second time Sandy wears a nightgown. First time was "Sandy's Rocket," third time was"Survival of the Idiots," and the fourth time was "Overbooked."
- This is the second episode to have karate in it. The first was "Tea at the Treedome."
- The Complete First Season DVD commentary said there was a scene were Sandy chopped a fish in the nuts.
- This is the 1st time karate wreaks havoc. 2nd will be on Karate Star.
- This is the first time Sandy's ears droop. This will happen again in Texas and Rodeo Daze.
- This is the first time Sandy works at the Krusty Krab.
- Kah-Rah-Tay will go on to have its own DVD with the same name.
- When SpongeBob tosses Krabby Patties onto Squidward's head, there are six, in the next shot, there are eight.
- When SpongeBob is cutting the food, on his first cut, the mustard seems to disappear.
- It is unknown how the rock halves separtated after SpongeBob let go of them.
- Oddly, during the fight between SpongeBob and Sandy, a brick can be seen in their dust cloud.
- After the bubble transition cuts to the Krusty Krab, some bubble freeze in mid-air. This error happened again in "Rock Bottom" and in "The Camping Episode."
- It is unknown if Sandy and SpongeBob ate the Krabby Patties because after fighting, (and making Krabby Patties) they were relaxing and the Patties were still on the ground.
- When SpongeBob slices the first slice of salami, the mustard bottle is missing.
- At the Bikini Bottom park, when Sandy karate chops SpongeBob's arm, SpongeBob doesn't have karate gear on, but in the next shot, SpongeBob has his karate gear on.
- A second window was added to SpongeBob's pineapple home near the lower right corner. Before, there was only one window on the upper left corner.
- In one scene where SpongeBob and Sandy are karate chopping each other, Sandy karate kicks SpongeBob into the background. SpongeBob yells "Curses!" and Sandy appears to be moving her mouth as though she is also saying it, though she could be mimicing it.
- When Squidward said, "Go!" the closed captions said "D'oh!."
- Mr. Krabs tells Squidward that he was in his office, however, you'll notice that Mr. Krabs' offices is the first door on the left, and when he comes in, he's on the right. But when SpongeBob talks to him, Mr. Krabs is on his office side, next to Squidward.
- When SpongeBob rolls Sandy into a ball, her helmet and flower disappear.