Roller window - GIF

Roller window.

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Previously:

Cubic skylight window - photo
Deer jumps through window of hair salon - video
Forming a brick window arch over a barrel - GIF
Huge wave shatters ferry windows - GIF
Making stained glass windows - GIF
Weaving window screens - GIF

Am I missing something? It just looks to me as an unnecessary complication to have an inside blind.