Let's take a trip back in time to 1987 ... or maybe 1999? ... to St. Godard's church.
"This is not a dream... not a dream. We are using your brain's electrical system as a receiver. We are unable to transmit through conscious neural interference. You are receiving this broadcast as a dream. We are transmitting from the year one, nine, nine, nine. You are receiving this broadcast in order to alter the events you are seeing. Our technology has not developed a transmitter strong enough to reach your conscious state of awareness, but this is not a dream. You are seeing what is actually occurring for the purpose of causality violation."
-- John Carpenter's Prince Of Darkness
[It's something of a "cult classic" - a movie that bombed when it was first released, but 20+ years later it's just bad-ass. The dream sequence above is one of those things that has become - like Freddy Krueger's razor fingers, or Jason's hockey mask - part of Our National Horror Film Heritage]