What's wrong with buying a standard electric toothbrush? This one to never try at home or elsewhere because it's Jackass levels of stupid and dangerous.
One 'inventive' Japanese YouTuber likes to do something that is quite uniquely unsafe and bizarre, and that thing is taping toothbrushes to automatic guns that he owns and testing them out to see if they make brushing his teeth easier. We'd almost be surprised but it's the internet and Japan so no, we're not.
Below is his G18c experiment, but if you want to see others there's a whole range of them on his YouTube page.
Via YouTube
