I have an old laptop that does that and the keys are very distracting whenever I hold it in tablet mode. I find myself holding it awkwardly on one side to avoid them, even though I know they’re disabled. It is still a nice feature though, I like being able to transition a laptop to portrait mode sometimes.

I do this too, usually because I’ve run across an odd word choice or turn of phrase. I am way less accurate though.

I’m not superstitious, but when I’m walking on sidewalks or tile floors I have tended to try to avoid cracks or lines. It’s an easy but engaging puzzle to try to do it while maintaining a normal gait, like the ambulatory equivalent of Sudoku.

Then, one day, my high school geometry teacher taught us about angle bisectors and the game changed permanently. Now, in addition to visible lines, any line intersections now produce invisible bisector rays that must also be avoided. I made a picture to show where you can’t step on a sidewalk. It has been decades since high school geometry and I still try to avoid bisector lines any time I’m on a suitable floor. I have never added another rule to the game since, and it wasn’t til this post that I thought about how strange that is.