Why do I find this satisfying?

Especially when I see Marth/Lucina's, Mewtwo's and Cloud's...

Marth/Lucina just because the moment they hit everyone, they literally are just sent zooming past the screen and gone in a blink of an eye. Holy moly, that knockback! I swear, their Final Smash seems to be the only one that looks like it can insta-kill you if it hits.

Mewwo because everyone was sent flying in systematic order

And Cloud... well that Omnifrappe sounds delicious