[It's once he's at the bottom that he looks up, raising an eyebrow as he listens to this story and despite himself he's actually grinning because it's funny. And sort of cute? Maybe both, actually, and he considers what to say after that.]

So you went on a rescue mission and the cops got mad. [He lifts an eyebrow.] Seems like a stupid reason to get hit with trespassing if the place was shut down anyway but some rules are stupid as it is. Wait, do you still have the crabs? [And once Karkat's on the ground he'll lead onward toward one of the back storage rooms.]