I saw this movie when I was a kid, so it must be an 80s or 70s movie. It's an alien movie of sorts; all I can remember is there is a black guy, and the alien has some sort of suit with a saw. I remember one scene in which the alien throws a bloody human skull. I believe the main character is a female and it's set in a bunker in the desert. I remember the last scene shows an egg in the desert.
It really reminds me of Moontrap (1988).
Astronauts discover relicts of an alien race on earth's moon.
The alien robot is able to rebuild itself from various materials and body parts - and does so in an earth laboratory using its saw.
The last scene shows the egg/football shaped robot "head" in a junkyard and we hear it repairing itself...
This movie haunted me in my childhood. Seeing it on YouTube today I must say that it wasn't Walter Koenig's (Pavel Chekov) most memorable role.
You can find the movie on YouTube:
Saw: around 1:11:50 Egg: around 1:25:30