Jack T. Walthall was Forrest's accidentally ironic, sweet-yet-tactless, 75-year-old ex-father-in-law. He was the father of Suzanne and the grandfather of Eric. Jack died on a trip to space when he was violently flung out of his seat during the lift-off. Jack's corpse floated around the spaceship during the whole space voyage, and was eventually returned to Earth. Portrayed by: Fred Willard.