I've watched my fair share of movies that contain segments in which the character is dreaming. Usually they know at once that they're dreaming, without having an epiphany or doing any reality checks. They just know. Also, their dreams aren't faded and slightly "sketchy", like real dreams are. They don't have subdued aspects that are "off" or wrong.

I find this a little annoying, now that I'm into lucid dreaming and how lucid dreams really happen. Well, DILDs at least. Anyone else find this a bit wierd?

Example:
Character goes into a sleeping position on the couch; a second later they get up and see someone who shouldn't be there.
Character: mom, what are you doing in my dream?