Though environmentalists would hate the idea of balloons wafting about the landscape, I don't think they'd mind them digitally dropped into our favorite movies. Take a few minutes to watch. It's a lovely idea (what a sap I am!). The balloon punctuates emotional moments in Casablanca , dances with Gene Kelly in Singing in the Rain , annoys King Kong, saves the life of Anne Parillaud in La Femme Nikita and meets Clint Eastwood at high noon. Kudos to Jerry Rees , a director and Cal Arts grad, for creating Helium and Celluloid .