The Tetris Effect occurs when a person who devotes such a great amount of time or attention to a single task that it begins to overshadow their thoughts and activities.

People who play Tetris for prolonged amounts of time often find themselves thinking about how shapes in the real world would fit together.

I’d be scared if it was called the Call of Duty Effect, where people think about how to snipe you as they watch you from the coffee shop across the street.