AllMovie

Terrified at the possibility that his mother-in-law is going to move into his home, Fred fixes up an old shack for the old battleaxe. Barney joins in on the project, which proves to be a lot more daunting than it seemed at first. Alas, once the shack is reconstructed, it proves to be somewhat less than substantial--in fact, it breaks loose from its bearings and begins careening down a steep mountain road, while ominous stock music from the earlier Hanna-Barbera cartoon series Jonny Quest blares away in the background!