Hey, Evie - let me give it a shot although I am not making much sense these days so take it with caution. Alot of times when people say they have found a solution to something, a sarcastic/humor-intended reply someone might make is that they just "quit doing it". For example, I could say that I have found a cure for my asthma...I quit breathing. Or I have discovered how to fix road rage...quit driving. She was joking with you in that you said you had found a way to stop nightmares...hence her comment you quit sleeping because you can't have nightmares as long as you are awake. Flashbacks, daymares, etc., etc. but not the traditional definition of nightmares. She was not intending it as any insult at all - just kind of sarcastic humor at something we battle so furiously against. Does that help at all? It is also possibly a more common American humor? I am not sure there but just a thought.