[veli_joza]

I remember some 15 years ago when I played few hours of tetris on fastest mode to see if I would be able to learn it. At first the game would last 3 seconds, but I managed to bump it up to some 10 seconds before becoming overwhelmed. It was fun exercise of learning process where rules and winning metrics are well defined.

That night while falling asleep, my mind was still playing tetris. I visualized the game vividly and could actually play it in my mind. Only later I learned this is actually called The Tetris Effect (https://en.wikipedia.org/wiki/Tetris_effect).