Many years ago I was out in the woods camping with friends. One night we got woken up by terrified screams from the other tent. We threw ourselves out to see wtf was happening. Turns out there was a big ass centipede in the tent with the guys, and they were just tumbling over each other like panicking clothes in washing machine, trying to smack the centipede with whatever they could get their hands on. It was funny to watch the tent rock back and forth with screams coming from the inside.
Some years before that, I was out at sea, snorkeling with a friend. I saw a gorgeous, huge, sea urchin shell at the bottom, so I dived down to grab it. A fucking centipede launched itself out of the sea urchin shell and swam past my head and up to the surface. That day I learned some centipedes live in the sea. That was not funny. That was absolutely terrifying. I did scream like a little bitch.





Ultrasonic vibrations have been successfully used to make cutting tools more effective for a long time. It doesn’t make the cutting edge sharper or amplify the force, it just moves it back and forth slightly, in microscopic imitations of a cutting motion. That does work. Though at the end of the day it won’t magically make a dull knife sharp.
Ultrasonic vibrations have also been successfully used to get shit off of surfaces for a long time too. It is a common and effective method. Though it usually involves a bit more than just shaking the thing, but still…
Theoretically this knife could very well do both of those things. Probably not well enough to be worth 425 dollars, but probably entire useless either.