There was a brief moment where I thought video games had to program every possible combination of pixels so it could react appropriately to what I was doing at any given time in a game. I had no idea how things rendered. I didn't know they were individual sprites that animated separately. Thought it was all just one big thing and they had to draw every single possibility with nothing dynamic going on.

Then I played Wolfenstein 3D on PC and realized how impossible that would be in 3D. Funnily enough, those little pocket games they had in the 80s and 90s like Game & Watch kinda were doing exactly what I thought every game was doing, but they were much simpler games for a reason.