Pirates of the Caribbean: At World's End - When the two pirate ships were throwing cannonballs at each other, it’s a take on the scene where the Black Pearl and the Flying Dutchman were doing the same.
The Phantom of the Opera and Dracula - When Mr. Turner is playing the organ while surfing, he spoofs both films.
Kirby - When the volcano explodes for the third time, his hat gets fire and for a split second, it resembles Kirby's Fire Crown.
Mona Lisa - During the surf contest, Mr. Turner is seen painting Leonardo Da Vinci's infamous painting.
Cosmo thinking that "Aloha" means "Bury your wife in sand", and buries Wanda whenever he hears it.
Echoing occurring after the word "Limbo" is said.
Timmy's parents suddenly crashing into rocks, even though this was just twice.
Jorgen ordering a pu-pu platter and saying that it tastes better than it sounds, and Cosmo says, "I made a pu-pu platter!".
Timmy's umbrella's words appear after it comes up.
Jorgen disappears when he echos Limbo the last moment.
When Timmy's Parents say "Limbo" it doesn't echo, however this may be because it is a different limbo.
Aloha actually means love, affections, kindness, both greetings, and farewell, however Timmy says "Aloha means, 'Hello', 'I love you', and 'Goodbye'." Aloha au ia'oe is the one that means "I love you" (Not really a goof, "love" could also mean "I love you").
Timmy and Poof grew facial hair during the Wish Limbo. It's impossible because babies and young children cannot grow facial hair. (Please note while this is true, FOP is a cartoon and shouldn't be held to real world logic. This was done for comedic effect.)