Even though this episode took place on Friday the 13th, it aired on Friday the 26th.
When all the Anti-Fairies made it down to Earth, they caused misfortune to all people. But Timmy's parents were not affected by their magic because they were wearing good luck charms at the time.
Before that, they were victims of bad luck.
Apparently the Anti-Fairies had waited for a long time for a godchild dumb enough to wish them all out of Anti-Fairy World since they remain imprisoned until any Friday the 13th, the day when they sneak out of Fairy World to do some bad luck to people.
It is revealed on the 7-7-07 marathon that the President is played by Butch Hartman.
Penn & Teller - The light pole on the corner where Timmy appears has two signs that say "Penn" and "Teller" making a reference to the famous magicians duo.
A running gag in this episode is that bad luck happens when Timmy accidentally does something that causes bad luck.
Mr. Turner lifting both his feet up only to fall down.
The Anti-Fairies can only be seen with some special Anti-Fairy goggles in this episode, but in later episodes, they can be seen without it. Although in The Gland Plan the anti-flight battle suits or the prison itself may have had something to prevent them from being invisible and from When Nerds Collide onward, Jorgen made sure through Da Rules that they will remain visible if they try to wreak any havoc on Fairy World or Earth.
When the Anti-Fairies are going back to Fairy World at the end, Anti-Cosmo has redneck teeth like Anti-Wanda.
When Anti-Cosmo and Anti-Wanda were back at Fairy World, Anti-Wanda's feet when she was eating were barefoot. But when Jorgen came back to his guard duty shift, Anti-Wanda's feet were in-pants like her Fairy counterpart.
When Timmy tricks the Anti-Fairies into going back through the door to Fairy World, Anti-Cosmo and Anti-Wanda can be seen flying into the portal multiple times.
Anti-Cosmo doesn't have fangs in this episode, but he does have them in later episodes.
After Wanda says "It's not bad yet" when the camera shot is wide, Cosmo and Wanda look like Anti-Cosmo and Anti-Wanda.
When Anti-Wanda says that Timmy tricked Anti-Fairies back to Fairy World, Anti-Cosmo's wand was gold.
When the Anti-Fairies are going back to Fairy World, Anti-Cosmo had a black crown instead of his bowler hat.
The sensor on the Anti-Fairy goggles disappear when Timmy was taking a picture with Anti-Cosmo.
Mr. Turner: Hello? Mr. Turner? It's me, Mr. Turner!
Mr. Turner: Curse you my own two feet! [grabs feet] STOP HURTING MY WIFE! [falls] (to Timmy) No time to talk! Quick, take this thirty seven leaf clover and go enjoy yourself!
Mr. Turner: Gadzooks! I'm not leaving until every crack in this park is filled! [grabs trowel, plaster, notices a plumber with loose pants nearby and is about to fill in the "crack" when the man runs away] COME BACK!
Timmy Turner: Hey you! Stop hurting my mom and ruining my day! And hurting my mom! I wanna talk to those anti-fairies right now!
Timmy: We're in the Fairy World! Where are the Anti-Fairies?
Anti-Cosmo: [speaks like a British gentleman] I'm the Anti-Fairy Cosmo. I'm not an idiot in any manner whatsoever.
Anti-Wanda: [speaks with stereotypical "redneck" drawl] And I'm the Anti-Wanda. I'm incredibly stupid and eats with my feets. [picks up sandwich with her feet and takes a bite out of it]
Anti-Cosmo: You see, we've been trapped behind that blasted barrier for centuries. But we knew some on some Friday the 13th, some child would be stupid enough to make his fairies bring him here and wish all of us free. You're our hero. Our BIG STUPID hero!
Anti-Fairy reporter: What a scoop! [takes a photograph of Anti-Cosmo posing with Timmy]
Timmy: Oh man, this is really bad, isn't it?
Cosmo: I'll say. That Anti-Cosmo made me feel like an idiot. [picks up sandwich with his feet and takes a bite out of it]