Watch Dunno Y Na Jaane Kyun - Bollywood Movie Review - Zeenat Aman, Helen, Rituparna Sengupta. Though a path breaking subject in Hindi cinema, 'Dunno Y... Na Jaane Kyun' borrows its plot from Hollywood flick 'Brokeback Mountain'. But even at that, it is badly scripted and narrated. Visit us at http://www.rajshri.com/Listing/Trailers-and-Trivia/Free-Hindi-Trailers-Trivia-New-Bollywood-Promos-Clips-First-Look for the latest bollywood film reviews, makings & trailers.