Foster his the ground with... not a lot of grace--even though he lands on his feet, he drops to his ass because he wasn't really in a position to catch himself. He doesn't even try to get up, either. He just tilts his head back to look at Taako that way.

"Sans is the warden. A supervisor." Foster says it in a tone that's... not nearly as disparaging as it could have been, honestly. He mostly sounds tired.

So Sans didn't put him up to it?

This is.... disappointing. But also leaves him incredibly aggravated. Because all other factors aside, this clueless... fucking rando took it upon himself to basically police... the face he was making and then take offence when Foster didn't feel like playing along.

"You know what? No. No, I don't care." It's a... bold statement coming from Foster, but Taako is likely too new to really be shocked. He's clambering to his feet, gesticulating agitatedly even before he's fully upright. One hand sweeps back into his wild blond hair, and he's avoiding looking Taako in the face for more than a half-second's glance or two.

"We're even now, right? I pissed you off, you pissed me off. Now we're even! It's fine! I'm going to leave, and you... you can return to.... to the uncanny valley from whence you came."

And with one final, pointed, two-second-long look, he turns away. Bye.