Deliberate mistake: When Eric's ship blows up, his statue bobs up and down. A statue this weight would not be able to bob up and down for even a second. It would just sink straight to the bottom.
Deliberate mistake: While trying to rescue Ariel at the end of the movie, Eric harpoons Ursula's arm, leaving a black cut. But in the following shots of Ursula, the cut is gone. (Due to Disney's practice in not leaving injuries onscreen).
Continuity mistake: When Carlotta brings the plates for the meal they all have a dome cover with a top handle, but when Sebastian runs across the table those handles have changed. (00:54:50)
Ursula: Come in. Come in, my child. We mustn't lurk in doorways. It's rude. One might question your upbringing.
Trivia: The two minute storm took 10 special effects artists over a year to finish.
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Chosen answer: They are all throughout the film but the biggest one is when Eric is steering the ship to stab or skewer Ursula.
Disney-Freak