#20: An Impractical Door Shape
We just talked about the difficulty of having a door that needs to be curved, and here this picture comes to remind us that the difficulty could be turned up to 11, if you felt so inclined.

This requires that not only the wood in the door be curved but also all of the glass, the door frame, and the door jamb. On the other hand, if this were your door, you would feel a little bit like you are living in some kind of medieval castle, and this is the tower, so I guess that’s kind of cool.
