Rex's triumphantly cool retreat stops as soon as the cup bounces off the back of his head. Did she just throw garbage at him? At him?

"Hey!" He glares over his shoulder, turns, and scowlingly stomps back over to the dumpster. Admittedly, it's difficult to look righteously angry when one's clutching a half-eaten bagel... or when one is a bit on the scrawny side and swallowed by scrubs the way Rex is. "What's your problem? I obviously didn't throw it at you on purpose and-- What the hell do you expect when you hide in a garbage can?!"

He narrows his eyes and stares at her. "What are you even doing in there?" You're talking to a rather privileged young man here, Kiden. Rex didn't know financial hardship until he came to Baedal, and so far, he's never been in a position where dumpster diving was necessary.