Lost Dream?

I had a dream last night that I don't think was mine. In the dream I was in a group of people who I knew. There was a tall girl with blonde hair and green eyes who I knew was my best friend. There was a guy there, that I knew I liked... Or had liked. We were all hanging out in someones house. It was a place I was familiar with. I've never seen myself in a dream but I saw me in a mirror and I wasn't myself. Well, not now anyway. I'm fairly certain that last night I had someone elses dream. The only problem with this idea is that the brain doesn't work like that. Does it? We all think of the mind as a self contained unit. The brain doesn't leak thoughts. It seems bizarre to imagine brain waves bouncing around the ionosphere just looking for a receiver for their electric messages. If that were true would people ever be able to finish a thought? Or even have a personality of their own? However, if you go back to the idea of thought simply being electrically powered particles holding information until it can be passed on somewhere else... why should they not get mixed up here and there. If things like the aurora can interfere with radio signals whats to say a radio signal or something of that sort can't interfere with thoughts? I wonder if there was an appearence of the northern lights last night... That seems to be the one way this would make sense. Brain waves surfing on synaptic junctions... Flowing around... and who knows, getting mixed up?