- SpongeBob SquarePants
- Sandy Cheeks
- Squidward Tentacles
- Eugene H. Krabs
- Unnamed worm (debut)
- Fish on SpongeBob's TV
- Volcano Sauce drop (debut)
- Unnamed fisher (debut)
SpongeBob and Sandy are practicing karate against each other. After fighting in SpongeBob's house, Sandy tells him that she will sneak up on him and fight him tomorrow. At the Barg'N-Mart, their battle continues. Later, Sandy pulls out SpongeBob's tongue and grabs a bottle of Volcano Sauce in order to have him surrender. SpongeBob imagines a face on the drop of hot sauce and quickly gives up. At the Krusty Krab the 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.
Mr. Krabs tells him to stop doing karate or else he will be fired. Later, Sandy attacks SpongeBob, and although he tries to explain Mr. Krabs' warning, Sandy thinks he is bluffing and does not listen. Mr. Krabs sees them and fires SpongeBob, who cries and runs around the place, throwing a huge tantrum. Feeling guilty, Sandy explains that it was her fault and begs Mr. Krabs to give SpongeBob his job back. Mr. Krabs agrees on the condition that they do no more karate, saying it is poisoning SpongeBob's mind.
The two try to forget about karate and go to Seashell Park for a picnic. However, everything reminds them of karate, particularly when SpongeBob slices bologna using karate chops. They eventually can't resist the urge and slice up all kinds of ingredients and make several sandwiches in the process. They eventually take up karate again and have a great deal of fun.
Mr. Krabs, who is taking a walk in the park, catches them surrounded by sandwiches and destroyed surroundings, clearly having broken their promise. SpongeBob admits the truth, saying he cannot help himself and that Mr. Krabs will simply have to fire him. However, Mr. Krabs says he has something else in mind.
Back at the Krusty Krab, SpongeBob and Sandy make Krabby Patties at an exceptional rate, using karate chops to slice and assemble the ingredients, which brings in lots of customers and makes Mr. Krabs twice as much money as before.
|( ‣ ) Associated production music|
|( • ) Original music|
|( ◦ ) SpongeBob music|
‣ Take That! (A) - Helene Muddiman [Title card]
‣ Panther Prowl - David Farnon [opening]
‣ Cieszyn Polka - Władyslaw Raczkowski [TV show]
‣ Police Car - Sam Spence [SpongeBob screams]
‣ Take That! (A) - Helene Muddiman [SpongeBob and Sandy doing karate]
‣ Police Car - Sam Spence [SpongeBob throws Sandy through the door]
‣ Hawaiian Link (A) - Richard Myhill [SpongeBob does a karate dance]
‣ Take That! (A) - Helene Muddiman [karate over the phone]
‣ Bossa Cubana - Gerhard Narholz [Sandy shopping]
‣ Hit and Run - Sam Spence [Sandy bumps into SpongeBob]
‣ Bossa Cubana - Gerhard Narholz ["Hey Sandy, have you ever heard the one about the squirrel and the tin cans?"]
‣ Take That! (A) - Helene Muddiman [tin cans]
‣ Police Car - Sam Spence [SpongeBob laughs]
‣ Dancing the Hula - Kapono Beamer ["What a beautiful day!"]
‣ Take That! (A) - Helene Muddiman [more karate]
‣ House of Horror - W. Merrick Farran [volcano sauce]
‣ Death Trap [#26.03] - Gregor F. Narholz ["By the powers of naughtiness..."]
‣ Panther Prowl - David Farnon [Sandy drinking volcano sauce.]
‣ Take That! (A) - Helene Muddiman [novelty toy]
‣ The Rake Hornpipe - Robert Alexander White [at the Krusty Krab]
‣ Keep Cool - Jean Christophe Thomas, Laurence Peter Cottle [customer swatting a fly/"I'm fast, I'm mean, and I can do this!"]
‣ Blow the Man Down (B) - Tim Laycock, Robert Alexander White [Mr. Krabs tells SpongeBob to get back to work]
‣ Keep Cool - Jean Christophe Thomas, Laurence Peter Cottle [SpongeBob enters the bathroom]
‣ Sailor's Waltz - Heinz Matschurat [Mr. Krabs tells SpongeBob to stop doing karate or he is fired]
‣ Hawaiian Link (B) - Richard Myhill ["Fired?"]
‣ Take That! (A) - Helene Muddiman [Sandy starts karate chopping SpongeBob/Sandy continues karate chopping SpongeBob/Sandy karate chopping SpongeBob again]
‣ Stack of Leis - Kapono Beamer [SpongeBob crying/"Aww, shoot, SpongeBob. I guess you ain't fibbing."]
‣ Hit and Run - Sam Spence [Sandy chops SpongeBob's face]
‣ Vibe Link (B) - Richard Myhill ["We can?"]
‣ Nostalgic Hawaii - George de Fretes, Jan Rap [SpongeBob squeezes a rock]
‣ On the Beach - Kapono Beamer [SpongeBob and Sandy on a picnic]
‣ Hit and Run - Sam Spence [Sandy chops the barnacle loaf]
‣ Mavericks - The Woodies [making sandwiches]
‣ Police Car - Sam Spence [sting]
‣ Take That! (A) - Helene Muddiman [they fight]
‣ Hawaiian Link (A) - Richard Myhill [everything cut in half]
‣ Dramatic Cue (D) - Ronald Hanmer [SpongeBob screams]
‣ O Makalapua (B) - Kapono Beamer ["Oh, all right, Mr. Krabs, you caught me."]
‣ Take That! (A) - Helene Muddiman [ending]
- This episode is available on The Complete 1st Season, Fear of a Krabby Patty, Absorbing Favorites, Karate Choppers, Karate Cutting, Sportingly Sandy, 10 Happiest Moments, First 100 Episodes, Really Big Box Set, The SpongeBob Birthday Box, The Ultimate SpongeBob Box Set, Treasure Chest: Double Pack, SpongeBob SquarePants Vol. 2, The Complete First Season, From the Beginning, Part 1, The SpongeBob SquarePants Collection, Extreme Kah-Rah-Tay (digital version only), Deep-Sea Games, Triple Pack 3, The SpongeBob SquarePants 8 Season DVD Collection, The First & Second Seasons, Movies & TV Collection, Big Hits: Volume 2, and The Best 200 Episodes Ever DVDs.
- This episode is also available on the Absorbing Favorites VHS tape and the UK version of the Fear of a Krabby Patty VHS tape.
- "Karate Choppers" was ranked #44 during the Best Day Ever event from November 9–10, 2006.
- "Karate Choppers" was ranked #29 during the SpongeBob's Top 100 event in the UK and Ireland from June 4-8, 2012.
- At the beginning of this episode, SpongeBob's shoes appear to make "quacking" sounds, only to reveal he has stepped on three squeaky toy ducks. "Stepping on ducks" is a euphemism for flatulence.
- Later in the episode, SpongeBob suggests he "cut the cheese," another euphemism for flatulence, although, in this case, it is literally slicing cheese.
- The fish shown on SpongeBob's TV is a royal gramma (Gramma loreto), a tropical aquarium fish.
- Tom Kenny portrays the Volcano Sauce drop.
- In the season 1 DVD commentary, Kenny explains that the scene was shot in the Nickelodeon restroom, and he had to wear red makeup all over his face to portray the character. He also had an audition on that same day the scene was shot, but the red makeup did not completely come off in time. As a result, he still had a little bit of red makeup on his face and it made him look like he was having high blood pressure.
- The Volcano Sauce drop is credited as "Hot Sauce Drop."
- The face SpongeBob makes when he is crying is seen on the cover on the Thai release of Season 6 Volume 2.
- A fish is seen fishing for fish with a fishing pole at the park.
- In this episode, SpongeBob is a karate master like Sandy. However, in all other episodes, SpongeBob is much less skilled.
- This episode includes the only instance in which SpongeBob defeats Sandy in a karate fight.
- There is an online game based on this episode called Kah Rah Tay Contest.
- This was Merriwether Williams' first episode as a writer. Her final episode was "Pranks a Lot."
- This episode marks the first time that SpongeBob gets fired (albeit briefly) from the Krusty Krab.
- This marks the only time which Sandy gets a job at the Krusty Krab.
- This is the first episode where "Dancing the Hula" plays normally instead of in reverse, like it did in its debut in "Pickles."
- This is the first of four episodes transcribed as a comic into the SpongeBob SquarePants/Tokyopop book Gone Nutty!. The other three were "Sandy, SpongeBob, and the Worm," "Pressure," and "Sandy's Rocket."
- Two clips of this episode were featured in the 2010 film Date Night. Also, Ray Liotta, who voices the leader of The Bubble Poppin' Boys in "What Ever Happened to SpongeBob?," also appeared in the movie as crime boss Joe Miletto.
- On The Complete 1st Season DVD, this episode, along with "Plankton!," has an audio commentary.
- In the Japanese dub, this episode is called "空手大好き," which translates to "I Love Karate."
- In the Croatian dub, the episode's name is "Karate udarci," which translates to "Karate Chops."
- A short clip of SpongeBob crying from this episode was featured in the music video for "Hallelujah Money," a 2017 single by British virtual band Gorillaz.
- This is the last episode to premiere in 1999, along with SB-129.
- There is a Russian DVD based on this episode called "Karate Choppers."
- When SpongeBob is caught off guard by Squidward's orders, he calls him "ma'am," "sir," "boss," then "Pooh-Bah." Grand Poohbah is a character from the Gilbert and Sullivan operetta, The Mikado, later made famous as a title given to the head of the Loyal Order of Water Buffaloes on The Flintstones.
- In the scene of the treedome at night, Sandy hums "The Yellow Rose of Texas."
- When Sandy is at SpongeBob's door, she has an extra stripe on her sleeve.
- SpongeBob leaves the kitchen with a tray of six Krabby Patties. When he tosses the Krabby Patties onto Squidward's head, all six stick to it. In the next shot, there are eight Krabby Patties. In the final zoom shot of Squidward's head after SpongeBob says "Nice hairpiece, Squidward," 10 Krabby Patties can be seen.
- When SpongeBob is cutting the food, on his first cut, the mustard dispenser seems to disappear.
- SpongeBob's arm disappears when Sandy hangs up on him after his attempt at phone karate.
- 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 of the bubbles freeze in mid-air.
- When SpongeBob slices the first slice of salami, the mustard bottle is missing.
- A second window is added to SpongeBob's pineapple house near the lower-right corner. Before, there was only one window on the upper left corner.
- Mr. Krabs tells Squidward that he was in his office. However, Mr. Krabs' office is the first door on the left, and when he comes in, he is on the right, but when SpongeBob talks to him, Mr. Krabs is on his office side, next to Squidward.
- When SpongeBob goes into the restroom at the Krusty Krab, there is the "Please wash your fins" sign on it. Later, when SpongeBob is walking, it disappears.
- In the scene with SpongeBob holding the rock together to hide it from Mr. Krabs, a tree can be seen in the background chopped in half. The "leaves" of the tree are also chopped in half, even though they would not be touched just from chopping the tree in half.
- In the scene where SpongeBob captures Sandy with the novelty toy tongue, she has her left arm inside her suit while she guzzles down hot sauce. Once SpongeBob loops the tongue around her, her arm immediately appears outside of the suit.
- When SpongeBob gets fired, his face wrinkles up. In this shot, one of his holes goes above his head.
- The Chum Bucket is missing from across the street when SpongeBob is caught and Sandy apologizes.