I have a question regarding my friend

I have been best friends with somebody for 3 years (We’re in Georgia). He usually has a lot of night terrors and stuff so when he tells me stuff I usually don’t care but he’s had this one terror and one nightmare that both last small moments. He said that on the terror he first had the second he opened his eyes that he felt something he said made him want to vomit and said it was nothing more than “evil.” He said it resembled a devil but only appeared for a second. He saw it again in a dream and felt the same feeling but only saw it’s face and the abyss surrounding it. Do you guys think it’s a simple night terror or something else? (It’s important to note that in all my years he has never said he had a night terror have the same “creature” twice)