Well, Aziraphale, if you're going to offer him snacks, he won't say no! He's got cute little paws, like tiny hands, and he accepts the nut without hesitation, though he tucks it under one arm rather than start eating right away.

"Hello, hello!" He's inordinately happy about all this, possibly tipsy in some way, and because it's Crowley's shoulder that he's on, he leans in and gives him an affectionate head-butt to the cheek. "Crowley, you're so serious! How can you stand to be so serious at a party?"

He leaps across to Aziraphale, then, and cracks open the peanut. "Its just a space-time rift of some sort in the hat, as far as I can tell. Perfectly safe for angels, at least. Feels like a roller-coaster! Not sure about the tranformation; it's even affected Lucifer. It's probably just a temporary glitch in reality, though. I wouldn't worry."

Yes, he did just toss the empty peanut shell into Aziraphale's hat.