An ex of mine used to come out with some crackers;
sat in a traffic jam on a dual carriageway "how comes the traffic on the otherside is still moving"
The bedroom was at the very top of a building and had a pitched ceiling with a skylight, if you stood up you could see accross to a retail park, all the neon signs etc, whilst laying in bed looking up through the skylight "wow, it must be really foggy, I can't even see the signs on B&Q"
She also used to sleep talk a lot and have dreams that you could control/influence. There were some classic moments, and some that perhaps made me a little cruel.