Is my coworker possessed with a demon?

Is my coworker possessed by a demon?
I'm a female who is single. I work with a strange dude. I stopped speaking to him because he seemed weird. I couldn't put my finger on it. The other day I was leaving and I saw him through the door with his eyes narrowed. When he realized I saw him his eyes started rolling to the back of his head an he was laughing. No he wasn't hav a seizure. Weird. I'm a christian.
Is my coworker possessed with a demon?
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