Uninvited (1988) Kids get stuck on a yacht with George Kennedy, mafioso, and a mutant killer cat that has a smaller mutant killer cat living inside it. Never accuse Greydon Clark of being unoriginal. TIL: Who knew the old saying about evil coming in small packages was so literal?
Your daily dose of culture courtesy of Eyeball (1975) - "The eye is the lamp of the body. So, if your eye is sound, your whole body will be full of light; but if your eye is not sound, your whole body will be full of darkness." - Matt. 6:22-23