I really like it when the tv or radio being switched on influences my dreams. Once I dreamt that I was a spy that was being interrogatd and I woke up to find that "The Ipcress Files" had just finished on TV and had obviously influenced what I was thinking
This is why I no longer sleep to grindcore or death metal. Now I just put on some Bob Marley or Pink Floyd, and my dreams are really spacey rather than terrifying. TV always does weird shit to me when I'm asleep, so I don't even do it that way anymore.