Nightmare I once had

There was a fashion show and an alien was in the changing room then i remember this girl running out and it was like the perspective changed from like how video games can be 3rd person and the girl was running on a sidewalk with barbed wire fence and the alien was chasing her it flipt to first person perspective like I was in her body as the alien ate her alive then stabbed the alien with a sword and stood ontop of it … think I dreamt that after watching men in black lol . That roach alien lowkey freaked me out .