SpongeBob goes to boating school and then continues to crash into two cars, inflating Mrs. Puff every time he continues to crash into an obstacle. Mrs. Puff then inflates so much, she sends the car airborne. SpongeBob then crashes the car into the lighthouse of the boating school, injuring Mrs. Puff. In the hospital, Doctor Forrest clarifies that Mrs. Puff's inflation sac was popped in the collision and she will not be able to "puff" again. Mrs. Puff has to be tranquilized after she leaps on to SpongeBob and man-handling his nose. SpongeBob then begins to ramble and the doctor tranquilizes him as well. SpongeBob then visits Mrs. Puff with a bouquet of flowers along with the hundreds of other flowers he sent her, which she appears to be allergic to. After forcing her into a wheelchair, he pushes her down the hallway. Doctors are seen sprinting through the hallway with muscular men on the gurneys. SpongeBob stops the Purple Doctorfish and asked what was going on. He replies the Demolition Derby members are about to battle in the hospital room. It appears that they are hitting each other with wheelchairs. Mrs. Puff imagines them smashing into SpongeBob and killing him. Her laughing attracts SpongeBob's attention, and she claims she has a way for him to earn "extra credit." After talking to Captain Lutefisk, she shows him how much damage SpongeBob can do with a boat, though he is just using a steering wheel. Lutefisk says he is perfect for the derby. At the derby, Mrs. Puff is enraged at how SpongeBob is defeating the competitors only by serendipity. She then grabs a tractor and starts to chase after SpongeBob, trying to smash him. They then collide into the boating school, where Mrs. Puff regains her "puff," before they get crushed by the school.
I can turn into a skyscraper!
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According to the storyboard, after SpongeBob went down the rail, the other skaters were originally going to say "Dude!" This was cut for unknown reasons.
This episode is hated massively by many fans and critics, mainly due to how Mrs. Puff, as the episode made abundantly clear, was trying to have SpongeBob murdered (the line "Why are you still ALIVE?!" also clarified this moreso). Her personality's transformation in this episode was dark, and she had never resorted to attempting to kill SpongeBob in the past. Additionally, SpongeBob's insensitive and insulting behavior to Mrs. Puff (combined with the fact that he was the one who crippled her in the first place) was also criticized, as was the episode not showing Mrs. Puff getting any comeuppance for her actions.
Debatably, the fact that this episode was rated PG in Canada is a reflection of these criticisms.
This is, by far, Mrs. Puff's darkest role in the series, as she had lost her sanity because of her life-changing accident combined with years of putting up with SpongeBob. In "Bumper to Bumper," Mrs. Puff gets really angry at SpongeBob for failing the test many times.
The plot is similar to "No Free Rides," because Mrs Puff gets sick of SpongeBob failing, and she wanted him out of her class (although it is flanderized to extreme proportions here). Then, she plans something for SpongeBob and covers it up as Extra Credit.
Captain Lutefisk is a reference to the WWE wrestler Captain Lou.
Captain Lutefisk's name is a reference to a dish made from fish called, "Lutefisk".
At the part where SpongeBob is pushing Mrs. Puff down the hall in Mrs. Puff's wheelchair, one of the pictures looks similar to the logo used by Apple Inc.
When The Kruncher was driving away from SpongeBob, after SpongeBob drove over him, The Kruncher's back fins was missing in that shot. There was another shot that also showed his missing back fin.
Oddly, even though Captain Lutefisk introduced the four drivers and SpongeBob, there was another unknown driver that tried to crash SpongeBob along with Blow Torch and Divin' Bell Dale. Those three also drove into another unknown fish that may be also competing in the derby.
In the part where SpongeBob says "Oh dear, I think I'm in that Fellow's way," his voice is higher pitched than usual, This also ouccred in "Little Yellow Book."
There is a part of the episode where SpongeBob drives on Blow Torch's face, according to the gravity (which is like real Life), SpongeBob should have squashed him instead of being balanced on his face. It may be that the sea has different gravity, which might explain how SpongeBob floated on to his face.
It's unknown what gave Mrs. Puff her "puff" back at the end of episode.
Despite being arrested in other episodes, she doesn't get arrested here, despite her trying to murder SpongeBob.
Mrs. Puff's hair outline turned black on two occasions, as she, and SpongeBob watched the derby inside the hospital.
When SpongeBob jumped out of the water (as a real life kitchen sponge), his sock mask was missing.
Nat Petersons lips were a pale yellow in one scene, then blue in the next.
The doctor said "Come look at this weeks casulties." Casualties is a fancy term for death, die, or died. None of the drivers appeared like this at the hospital.