TEXT: "Puppeteer John Henson, the son of the late Muppets creator Jim Henson, is seen with Muppets Miss Piggy and Kermit at the Disney/MGM studios in Lake Buena Vista, Florida. Cheryl Henson says her brother died of a ""massive heart attack"" died at his home in Saugerties, New York on Friday Feb. 14, 2014. He was 48."