Season 4, episode 10 "Ben 10 vs. The Negative 10, Part 2": As we could see in first season's final episode, "Secrets", Roosevelt's head on Mt. Rushmore was totally destroyed, and in most subsequent episodes - including this one's first part - there is a sizable hole in its place. But after Ben asks whether the plumbers' hologram technology can replicate 'big presidents', and the scene changes to the demolished presidents' heads, the crown of Roosevelt's head suddenly joins the others on the mountainside. See more...
About all of the aliens found in attendance of Kevin's mega cruiser strangely resemble those individuals previously seen (on the selfsame ship) in episode 2-5, "Grudge Match", whereas they should have escaped the cruiser near the end of that episode. See more...
Comments made in brackets are corrections from other visitors. As such, any aggressive/abusive corrections (and I get quite a few) written as if they're comments I've made myself will be ignored. To submit your own corrections for mistakes, just click the edit icon under an entry, then choose "correct entry". Some entries have "duplicated entry" after them - these are entries which were already listed on the main page, but were submitted again. I occasionally leave these online for a while, just in case they were moved in error, so don't worry about pointing them out to me.
0-0 entire series: When Ben changes from the alien forms back into human, he usually wears his usual attire: a white T-shirt and brown pants. But in some episodes, like "The Krakken" or "A Small Problem" he wears different clothes - or even just swimming trunks, yet he appears dressed in his normal clothes. [It doesn't matter what he was wearing at the time, just what he had on when the omnitrix first attached.]
1-8 Tourist Trap: One of Sparkville's 'giant' attraction is a huge ketchup bottle - filled with ketchup. It would rather be strange to keep the stuff - or even just paint - in a huge bottle out in the open, since it would either spoil, evaporate or dry up, and refills would come too expensive for a container this size. [It wouldn't evaporate as ketchup's a paste, not a fluid. It wouldn't dry up as long as the lid was on it. It wouldn't spoil as long as it had never been opened (ketchup in the grocery store isn't refrigerated). There's no reason not to have it full. And every reason, even if they must refill from time to time, to keep it topped off: tourist money.]
Corrected by Phixius
1-11 "A Small Problem": At a swimming pool for juvenile swimmers - especially with such a water slide - the pool would have to be sufficiently deep to acommodate visitors comfortably. Yet Ben/Grey Matter seems to be standing on the pool's floor with ease, given that he is six inches tall and about two inches (his head) are above the water, since he makes no swimming movements. And despite all that, Howell Waynewright is able to fully submerge *and* grab Ben from below instead of from behind, which he would have to do if Ben had been swimming. [Gray Matter is an alien, he could very well be less dense in water which would cause him to float.]
In the end credits, one of the characters listed is Ripjaws, who is, however, actually not featured in this episode. [They're just general credits for the show. Unless the actor listed does not do Ripjaws' voice, there's no mistake.]
Corrected by Phixius
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