Riotous prehistoric comedy follows forward-thinking caveman Ishbo (Adam Rifkin, who also wrote and directed) as he tries in vain to help humanity progress with "silly" inventions like toothbrushes and pants. Laughed at by the rest of his tribe, Ishbo attempts to win the heart of a beautiful cavegirl (Ali Larter) without having to resort to clubbing her over the head. David Carradine, Tom Arnold, Ron Jeremy, Gary Busey, and Talia Shire also star. AKA: "Homo Erectus." 87 min. Standard; Soundtracks: English Dolby Digital 5.1, Dolby Digital stereo Surround; Subtitles: English, Spanish; music video; featurette; audio commentary; bloopers; interview; more.