I was a young kid watching an inappropriate alien movie sometime in the early 90’s. The only thing I remember is that there is a black guy on a bulldozer like thing underground. He was a good guy helping the protagonist and then all of a sudden reveals himself to be an alien. I think he turned orange with tentacles. It may not have been a very scary movie, but it frightened me and I still have nightmares about it. Being able to re-watch it as an adult may help me get over it.
Thanks
Total Recall 1990
See video at 50 seconds
http://www.funnyordie.com/videos/705865a58d/benny-s-song-five-kids-to-feed-1990-total-recall-music-video
https://www.youtube.com/watch?v=j3ftd2TApqc
Around 9:38 the black guy appears. The bulldozer-like thing is not seen in this video, but does appear in the film.