I believe the movie was made in the late 80's or early 90's. I was a child when I saw it so I cannot remember too much about it. I do remember that some criminals kidnap a class of children and their teacher. The criminals wear animal masks (duck, pig, etc... ) throughout the movie. They take the class to a cave for some reason, but on the way there they stop at some elderly peoples house and one of the criminals shoots the old man with a shotgun and it breaks a fish tank in the house. The main thing I remember about this film was it would periodically show a human heart beating in a jar. At the end of the movie the heart in the jar stops beating. I've been trying to find this movie forever it seems so any help at all would be appreciated. Thank you
