What parts of a video game break the illusion of reality to you?

This is under the assumption it’s a game based on reality. Something more out of the Grand Theft Auto series then World of Warcraft.

I’m not sure how to elaborate this, but I can give examples.

Things like:
-Being able to take several gun shots without dying.
-Reaching an invisible wall or ceiling.
-Seeing the same generic enemy over and over.
-Loosing control during a cutscene.
-Not being able to go into a building because it’s only there as a visual.