Unlike regular balloon boy, Nightmare balloon boy "pops" the sweet and innocent look and dawns a more menacing animatronic design. With his large, pointed teeth, claw-like fingers and sinister eyes, Nightmare balloon boy is just that, a terrifying animatronic that wishes to turn you into his own personal balloon animal. Unlike regular balloon boy, Nightmare balloon boy "pops" the sweet and innocent look and dawns a more menacing animatronic design. With his large, pointed teeth, claw-like fingers and sinister eyes, Nightmare balloon boy is just that, a terrifying animatronic that wishes to turn you into his own personal balloon animal.