Fourth-Wall Observer is what happens when a particular character has this on full-time and the rest do not.See also Genre Savvy (which doesn't involve the Fourth Wall) and No Fourth Wall.Five years ago Carl Johnson escaped from the pressures of life in Los Santos, San Andreas...a city tearing itself apart with gang trouble, drugs and corruption. His mother has been murdered, his family has fallen apart and his childhood friends are all heading towards disaster.
Cut to film: of them appearing at the door hesitating and then closing door.
No explanation is necessary for why our hero can hear a ringing telephone but not the movie's soundtrack, or why the space ship is menaced by the Negative Space Wedgie, but not by the opening credits drifting by outside the ship: it's something we accept as part of our Willing Suspension of Disbelief.
It's also a wonderful thing to play with, and that is what Medium Awareness does; the characters acknowledge and interact with elements and conventions of the medium that shouldn't technically "exist" in-universe.
Cut to studio: they run to Sir William in the centre of the room..
Only dramatically he's gone down to the basement, you see.