There was a 50s zombie flick that had a climax where the hero and heroine were trapped in the Zombie Cave, and suddenly the mysterious goo that turns you into a zombie starts dripping down the walls of the cave. It was so obviously soap suds that, even at the age of eight, I couldn't stop laughing. This movie also contained an awful but very catchy Calypso song about zombies. I have always wondered what the name of the movie was. Anybody?