I remember a movie I think I saw in the 90s on channel Fox 5.  I think the movie was from the 80s. It was in English and in color.  I remember some humans go into an underground cave.  In the cave these little white creatures that have human face come out.  I think the face color was either green or red.  I think they were like oompa loompas from chocolate factory.  Also I remember at the end there was an unexpected ending.  The main character I think gets shot and killed.  I remember it was on a bus. Please help me find this movie!