A slight huff of exasperation. How the hell was he--

He took a sec before making a slightly more drastic demonstration. He picked some more leaves, made some exaggerated eating grunts, followed by an equally exaggerated choking sound, and then finally a "uuugh I am poisoned and dying" bleeegh. Tongue sticking out and all.

After that, he huffs again, though its more of an affirmative huff.

Terezi can stay if she wants.

And if she liked beer, great! It would otherwise go to waste since he generally didn't drink it.