[Arthur instinctively flinches back, keeping his feet planted firmly where they are, even though he'd really keep as much distance from the big, scary guy as possible. His expression twists a little, trace of a sneer on his face when Perry speaks, but he's quiet now, no more back-talking. He wants to balk at the idea of apologizing to the creep who hit him, but it's do it or get hit again, so he frowns, looks down and nods sullenly, muttering:] Sorry.