I know that's a strange question to ask. But I don't recall any dreams to date that I can classify as a nightmare. I've experienced fear in my dreams or I have seen something that I am afraid of in my dream, but when I wake up, it doesn't bother me much. I have been having the preconception that nightmares will leave a haunting effect on you after you wake up.

The closest I got to that was looking at a mirror in a lucid and fearing the mirror will show me some darn images I fear. I was afraid so I closed my eyes and I ended up in a FA. It was over within seconds.