Bruno's about to ask about what Tenten means when Jackie speaks and he looks up, startled - oh, right, that guy. He smiles apologetically. "Heh, sorry - you were so quiet I forgot..." He then trails off as he finally takes in the blood.

His expression instantly switches from sheepish to concerned. "Oh no, are you hurt?" Sure, the guy doesn't seem hurt, but why else would there be blood? What possible other reason could there be?