Santa and the Ice Cream Bunny contains examples of:
Ass Pull: Santa's sleigh magically warps back to the North Pole at the end. Not only is right out of nowhere, it contradicts an earlier scene Santa says he can't just fly back home on an airplane because "what would I do with my sleigh?"
The biggest example might be Santa's "stuck" sleigh. You can clearly see the thing moving in several scenes after "failed" attempts to extract it. Also, it appears to be "buried" in a quarter-inch of sand. In certain spots along the rails. Which Santa almost entirely cleared off in a few seconds before giving up. (It probably would've helped if Santa got out of the damned thing when they pushed.)
Squick: When Santa gets out of his sleigh to help with the sheep, you could see a dark stain on his pants. Please God, let that just be sweat!
To put it in perspective, consider The Agony Booth's Recap. Of the 64 occurances of their signature bracketed punctuations, only nine of them were directed towards the Thumbelina portion of the movie. The number of the most bracketed punctuations Thumbelina got in a single page is 3 (which is during the scene where Thumbelina meets Mr. Digger)note Specifically, Page 7, in which the film earns a "[?]" for Mr. Digger being described as going south for the winter, a "[!!]" for when Mr. Digger reveals he only has an informal idea of what a beam of sunlight looks like, and another "[!!]" for when Mr. Digger asks Thumbelina to marry him.. In contrast, the number of the least amount of bracketed punctuations the main portion of the film recieved on a single page is five. And that's in the first page, which only covers the opening scene with the elves in the North Polenote Specifically, a "[?]" for the "Film by" credit not being the final credit, a "[!]" upon the revelation that the film's director, Barry Marrow, also directed Rocket Attack USA, a "[!!]" upon the revelation that he also made porn flicks, another "[!!]" for one the elves kissing a doll supposedly made for the kids, and another "[!]" for the Stock Footage Failure of reindeer in a very grassy area in what is supposedly the North Pole..
The Thumbelina adaptation contains examples of:
Accidental Nightmare Fuel: The various animal costumes. The costume design was so poor that several of the animals look like the fever dreams of a mental patient. The Rifftrax guys point this out by screaming in what can only be described as mortal terror.
Crowning Music of Awesome: Perhaps the only thing about this whole movie that comes close to being described as awesome (or even tolerable) is the Happily Ever After song, at least compared with everything else. However...
Ending Fatigue: ... it goes on forever. Doesn't help with the long framing device final sequence when the girl meets her boyfriend at the park after seeing the diorama.
Informed Attractiveness: Thumbelina is implied to be absolutely perfect in all but size, but the actress playing her is average-looking at best, with vacant eyes and large eyebrows. At least she wasn't wearing a bra...
The set designs, which look more like blown up versions of grade school dioramas. Which, to be fair, is what they're supposed to be.
They had trouble getting proportions right, either the coffee mug Thumbelina is standing next to is miniscule, or the walnut shell she sleeps in is gigantic (maybe both).
One scene in particular has Thumbelina looking at a scratchy, faded rear projection of her mother as she talks to Thumbelina, intending to be a shot from Thumbelina's perspective. Instead, it comes off as both this trope and Nightmare Fuel.
When Thumbelina and Mr. Bird are shown flying, the sky is just a plain white background (with obvious shadows on the walls), with a fan offscreen blowing gently in front of them to further simulate the "effect" of flying.
The Jack and the Beanstalk adaptation contains examples of:
Bad "Bad Acting": The acting in Jack makes the acting in Thumbelina look like the Mercury Theater.
Brain Bleach: In one scene with Honest John, one of his potential customers is sporting a very visible, very prominent male cameltoe!
Crowning Music of Awesome: Compared to the Thumbelina segment, the songs in this one are actually pretty decent at the very least. If anything the singers are much better too.
Ear Worm: The "Fee fi fo fum" song will not easily leave your head.
Padding: The very long sequences of Jack climbing up and down the vine plus the giant singing his "Fee fi fo fum" song three times.