Running at about 3 minutes long, O'Brien had what look like a lot of fun making this stop motion animation, set in prehistoric time. You can see how this film was a stepping stone for "The Lost World". Though the animation is a bit crude, it is amazing what he was able accomplish here. This film is quite funny. You can find it as one of the additional features of the abridged version of "The Lost World", though there is no mention of it on the DVD. Scroll to the end of "The Lost World" movie will have a few short films that will include another O'Brien film "R.F.D., 10,000 B.C. A Mannikin Comedy". I think this is a must see for O'Brien fans!