"Hmm..." That's a somewhat affirmative sounding grumble. Maybe! (When he's feeling down? Yes.) "I'd hope it's not that big," or that the illness isn't that fast-acting. But. Who knows?

He's following at a decently steady pace, at least. He doesn't seem so woozy that he's about to lose his balance, and he's not moving so slowly that he can't exactly keep up. It's taking a bit of focus on his part, but a trip to get some water isn't the most taxing thing to be doing right now.