Another brief note, RP-wise:

Dreams neither have to be cohesive, coherent conversations, nor totally surrealistic. Conversations in most- not all, just most- people's dreams tend to wander weirdly but make perfect sense in the context of the dream, only losing their content when the dreamer wakes.

And nightmares are funny things, being highly subjective. Remember what Pterry points out: "Hi! I'm your worst nightmare!" is often only accurate if spoken by a giant cabbage with a whirling bit, or a pair of socks chasing you down the street, or whatever. It's all in what your mind makes of it, not in how recognizably horrible the subject matter is to the rest of the population.

Just saying.