When did you get hit by "the tetris effect" AKA playing a video game so much that you get the urge to do moves/actions from the video game in real life?
When I got hooked on Morrowind in middle school it occurred to me to quicksave before a test at school.
Back during the WoW days (the flying mount expansion), every time I would walk home from Uni I'd think: "This would be a lot faster if I turned into a crow and flew over these houses".