That's a different Atomsk, they just have the same tag [unless you're referencing someone you know, that's not Brawl Atomsk]. And yes I was trying to CC, and I find the first gif hilarious [the second one is way more satisfying though].
For the record, I don't do that in real matches [find the one of me vs this guy Sizzle where I get 4-stocked : ( my Marth sucks] but I could tell I was better than that guy and I wanted to look cool so... I took 4th in PM and placed poorly in Melee.