I saw a really neat car the other day called the O-Zilla. What I found neat about it was the rotational movement of its door. I was interested in cars when I was really little, but I have never really followed up on it since then. I looked it up and found that this type of door has been around for more than 40 years, first found in the Lamborghini. They're also called scissor doors.
I thought that this was an interesting idea to open doors not in the regular horizontal X plane, but to be able to rotate the whole door. Therefore, the motion or direction is more of a rotation rather than a simple planar movement. For myself, this was quite fascinating, as most of the time I'm thinking about the X plane, the Y plane, or the Z plane, and not so much rotational directions.
