Some individuals may flap their hands, or pass objects in front of their eyes, or stare at ceiling fans; and some may not do any of these things. Others may have trouble making eye contact or understanding social cues; and some may look you straight in the eye and say hello. Some may be able to tell you every imaginable statistic about your favorite baseball team; others may not be able to say a word. Some may look perfectly "normal" in public; others may remind you of caged animals.