But back to the episode, where Mohamad, newly Nirvana'd, notices a sad looking Sam in an office window apparently ready to hang himself. Again, to his credit (this is the apocalypse, you don't owe anyone anything), he goes running into the building, risking the wrath of beaurocratic vampire accountants, to save Sam from himself. Sam reveals he is deaf. Mohamad reveals he knows ASL. Instant friendship.