Mewtwo Disable Superjump Glitch

https://reddit.com/link/1s5f0zz/video/v696hp017nrg1/player

So I found this funny glitch and I couldn't find anybody talking about it aside from a old video on the Mewtwo Down B's page on Smash Wiki, and I find it weird that I never seen anyone mentioning this glitch anywhere before, I just discovered it by myself.

I guess nobody's talking about it because it's irrelevant regarding competition, too bad. :(