This is based on opinion. Please don't list it on a work's trope example list.
Nightmare Fuel / Stuart Ashen
BABY LOVES YOU.
The reveal of the bootlegged non-Bart Simpson figure that adorns the box of the Huge Screen v2 when he removes the sticky note covering it. His scream when it's revealed and description of it both sound fairly comical, saying that the creators were going for a Guile look and somebody took some bites out of it but... as Ashens says himself, "just look at it!◊"
His voice for the bootlegged Bart Simpson (as said hereand here) sounds like the Hammerites from Thief.
Stuart wasn't kidding when he said that this video would get more disturbing as time went on. Who would have thought cheap animation could be so horrifying?
The dissonant sounding "God Save the Queen" at the end of the Royal Wedding Tat review. At least before it's apparent that the music is breakingas it slowly stops to a crawl.
Any occurrence of Noseybonk, a little-known source of Nightmare Fuel from the old British 80s Game ShowJigsaw. Yeah, an already unnerving entity gets made even more terrifying. Even better, Ashen's Noseybonk mask is scarier than the original!
The Gnome Radio. Not only does its face plunge straight into the Uncanny Valley, the sound quality apparently doesn't help as it makes things sound distorted and loud. Even worse, when Stuart realizes he can get away with playing a few seconds of the radio, it instead plays creepy rhythmic noises that sound straight out of a horror movie. Even Stuart is completely thrown off and can only surmise that "it tunes directly into hell."
In his review of Girl's Toys, he brought up a doll dressed up in wedding garb. This wouldn't be so bad if not for the positioning of the doll's eyes inducing this trope with a very big bang. Even when he just looks at it, the only thing he says is just pure screams of terror as he is very visibly is having a sanity breakdown and literally burns the toy to kill it.
The Creme Egg knockoffs in the Easter Tat Special were disgusting and rancid, but not initially horrifying. And then Ashen finds a maggot in the middle of a candy piece. Though admittedly a fake one, planted as part of a behind the scenes prank.
What he actually did is known as Circuit-Bending. Basically he cut off the outer coating (skinned it alive) then fiddled with the internal circuits. The result made it sound like E.T was being brutally murdered while his screams were muffled. This combined with Ashen's speech about how he is going to make it better causes it to be nightmare fuel. Now, imagine if E.T was sentient...
It gets worse. After the traditional ASHENS.COM at the end of the video, we see E.T.'s rubber face pinned to a corkboard with the same Scare Chord as heard before.
The Stock Clearance Special, when Fridge Horror hit Ashens on how the "Cutants" are, in Polly Pocket's world, alive and sentient. He gets upset by the idea, and he decides to make a horror short to illustrate just how scary things would be if Polly Pocket and her group of mad scientists decide to move on to humans and were to come after your girlfriend...warning Contains unhealthy high doses of Uncanny Valley And Body Horror
You wouldn't expect a semi-Christmas related advent calender to have anything terrifying in it, right? You'd be wrong. Hell, the grass masks in general. From assimilating both deer to hanging Santa from the tree by his sleigh.
The grass masks return in the 2014 Block-Tech advent calendar series. For the first 20 days, they do nothing but pop up occasionally and be very unsettling, which is exacerbated by the fact that Stu never once so much as alludes to them during the main videos. On the 21st day, Stu has an unseasonal bout of hay fever. On the 22rd day, he finds a handful of grass stuffed into the sofa. On the 23rd day, we have... this... And on the 24th day... well, see for yourself.
One of his earliest videos in the POP Station Saga is a review of one of the games that frequently comes pre-installed on the rotten little pieces of trash, Submarine Invasion. The review itself is significantly shorter than the run time of the video, but Stuart managed to fill the leftover time... by using somewhat grainy grayscale video footage of someone in a white lab coat and what appears to be a welder's face mask fiddling with a machine that rattles off lists of numbers. That's all the extra footage consists of, and it's deeply unsettling.
His Big "SHUT UP!" to the iPhone 5G was rather convincing, to the point that it does paint an ugly picture about what he could be like when set off.
His take on the Drawn My Life meme. Wait, how could he make an innocent fad like this disturbing? Well...
His Viewmaster Stereoscope review has a really dark turn at the end where he plays the "Little Red Riding Hood" slide on the JR. Projector. Before that, Ashens commentary on the previous films were hilarious and descriptive, until the aforementioned film shows up. Ashens narration in this is monotone and bluntnote made even worse that he's actually reading the descriptions seen on the slide, and combined with the unsettling claymation models and creepy music made it rather disturbing.
In 2011, his announcement that he would be making videos full time, seen here. Or if you'd prefer the "director's cut", in which he adds a painfully brickwalled "Morningtown Ride" by The Seekers in the soundtrack.
A LOVELY BABY, one of the most horrifying examples of the Uncanny Valley yet and currently serves as the page image.note At least, it was one of the most horrifying examples until the Gloobee Dolls video came (see below).
The 2016 Halloween Special ends on a colossal cluster-bomb of nightmarish images and videos. The video contains some Freeze-Frame bonusesnote (like Mentski's head that appears in some of his videos◊) rendered in Google Deep Dream which can probably startle somebody if they were watching it, but that's not the worst part. After reading one too many awful Halloween jokes from the Halloween crackers, Stuart lapses into a state of utter despondency for 40 seconds, before manically screaming and smashing the camera. As the video glitches in and out, we get glimpses of previous clips from his videos, like Quincy the Singing Caterpillarnote (who sang obscure Beatle songs), a video of fellow YouTuber Mentski in deep shadow looking confused with blaring audio, the creepy clown puppet from the Breakfast Mess advert with modified lyrics, The Silver Skull desperately reaching towards the camera ("You've forgotten me... you've forgotten me!"), Noseybonk, and finally, a collection of various other images with a very loud sound before finishing on a fake "This video has been removed by the user" notice... although only 10 seconds later, a final last blast of booming, distorted audio and glitchy graphics is displayed as the image changes one final time. The red "sorry about that" icon is replaced with a red Grass Mask from the Playmobil 2013 advent calendar videos and the text above reading how the video was removed now says "This video never existed."Witness the horror for yourself here. Have fun sleeping.
The Google Deep Dream image of Chef Excellence is extremely unnerving. Plus, the text that usually says "An excellent X" is broken and just says "nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn" as the jingle plays alongside glitched up audio.
The Mrs. Potts Funko Pop (and by extension, the Chip Funko Pop) from his "Worst Funko Pop Vinyl Figurines" video is rather unsettling with her dead eyed stare created with the big black eyes that Funko Pops are well known for, giving her a soulless Thousand-Yard Stare, and when combined with her grin, creates something really unnerving. Chip has the same eyes but his smile at least takes away some of the disturbing factor. Later on, near the end of the video, she ever so subtly bares her teeth.