Krrish
Krrish opens with the very young and chubby boy Krishna Mehra unveiling his precocious talents to his astounded school instructors, who begin to test him for his I.Q. level. Krishna's grandmother (Rekha), fearful of the consequences, takes Krishna far, far away and raises him in the isolation of the forests and mountains. Years later, Krishna (Hrithik Roshan) is now an innocent, sheltered (but very well muscled) young man, at peace with nature and its creatures. And he grins a lot, I'm assuming because he's pure of heart or something.