Another impossible Quadbar

We start with a simple 3D-rectangle to build a 4-bar-construction. Then we draw another bar, passing through the left side of the rectangle.
Observing that this bar passes the right side of our rectangle, we can change visibility (in an incorrect way) to give the impression of the bar crossing the right side.

Now we adjust visibility as if the bar enclosed the two vertical sides and remove the construction lines:

And by compressing the height a bit, we arrive at a funny picture that seems possible in every detail, but is not in whole.