HONG KONG — A six-minute film showing a grumpy man scolding a fellow Hong Kong bus rider for interrupting his phone call has become one of the most popular videos online. "Bus Uncle," as the film is commonly known, has been viewed nearly 1.7 million times on the video Web site youtube.com — the second-most-viewed video on the site in May as of Thursday — spawning spoofs and new slang drawn from the ranting subject's emotionally charged soliloquy. The grainy film was apparently recorded using a mobile phone. The film starts out when a middle-age man reacts strongly when a...