Clearly they are one of those that can't park to the right. They pulled in at such a shallow angle (no other obstacles around) that I thought they were going to clip the corner of my car.

The car is now parked completely diagonally in the spot next to me and the person walked away without a second glance.

It would be funny if someone in a long truck we're to park in my spot when I leave. I think the car would be trapped.