Obsessive-compulsive walking patterns / cracks / lines / etc.

[Ulysses]

So, I met this girl recently. I commented on her walking pattern and it really freaked her out. She thought she was the only person who did stuff like this. What I'm talking about is doing things like:

Not stepping on cracks.

If there are square patterns, stepping in the middle of the squares, never on the lines.

If there are lines/grooves on the sidewalk (like, at a corner), orienting your feet/steps in the same direction.

If there is a painted line on the crosswalk, either walking only on the paint or not on the paint.

Who here know WTF I am talking about and/or partakes in such obsessive compulsive walking quirkiness?