[She's going to risk breaking her hand to punch him, to be honest. Just a love tap on his chest even if she winces it was so worth it.]

I knew it! It's impossible to get back at you!

[Aaaand she falls to her side, because of course she does, scowling lightly at Mettaton before having the nerve to kick at him lightly with her foot.]

So? Where do you stick batteries or whatever? I'd ask if it'd be in your mouth or up your ass, but they'd be going to the same place anyway.